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136 relations: ACEA agreement, Acura MDX, Air conditioning, Alcohol fuel, Alternative fuel vehicle, Ammonia, Annual fuel utilization efficiency, Audi, Autogas, Avgas, Biodiesel, Biofuel, BMW, Brake specific fuel consumption, British thermal unit, Butane, Car costs, Carbon dioxide, Carbon dioxide equivalent, Cargo, Cetane number, Chemical energy, Combustion, Controlled-access highway, Convection, Corporate average fuel economy, Daimler AG, Detergent, Diesel engine, Diesel fuel, Diesel–electric transmission, Diffusion flame, Distance, Distributive property, Drag (physics), E85, EcoAuto, Efficient energy use, Electric vehicle, Electrolysis, Emission standard, Energy conservation, Energy content of biofuel, Energy conversion efficiency, Energy density, Energy efficiency in transport, Energy-efficient driving, Engine, Engine efficiency, Ethanol fuel, ..., Eurostar, Fossil fuel power station, Front-engine, front-wheel-drive layout, Front-wheel drive, Fuel, Fuel cell, Fuel economy in automobiles, Fuel injection, Full-size car, Gallon, Gas-guzzler, Gasoline, General Motors, Gibbs free energy, Gross vehicle weight rating, Haber process, Heat of combustion, Honda, Honda Accord, Hybrid vehicle, Hydroelectricity, Hydrogen production, Hydrogen vehicle, Imperial units, Jet fuel, Joule, Kilometre, Kilowatt hour, Kinetic energy, Life-cycle assessment, Lightweighting, Liquefied natural gas, Liquefied petroleum gas, Liquid hydrogen, Litre, Low rolling resistance tire, Low-carbon power, Marine fuel management, Methanol, Metric system, Micro-g environment, Microcar, Mid-size car, Mile, Motor fuel, Multiplicative inverse, NASA, Natural gas vehicle, North America, Norway, Oak Ridge National Laboratory, Octane rating, Outer space, Overhead line, Pickup truck, Poppet valve, Potential energy, Premixed flame, Propane, Rail transport, Ratio, Rolling resistance, Scandinavian mile, Smart Fortwo, Sphere, Sport utility vehicle, Spritmonitor, Supermini, Sweden, Thermal efficiency, Tire, Toyota, Toyota Prius, Transmission (mechanics), Transport, Turbocharger, Twinjet, United States Department of Energy, United States Environmental Protection Agency, V8 engine, Vehicular metrics, Volkswagen, Volkswagen Group, Weightlessness, Work (physics), Yellow grease. Expand index (86 more) »
ACEA agreement
The ACEA agreement refers to a voluntary agreement between the European Automobile Manufacturers Association (ACEA) and the European Commission to limit the amount of carbon dioxide (CO2) emitted by passenger cars sold in Europe.
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Acura MDX
The Acura MDX, or Honda MDX as known in Japan and Australia (only the first generation was imported), is a mid-size three-row luxury crossover, produced by the Japanese automaker Honda under its Acura luxury nameplate since 2000.
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Air conditioning
Air conditioning (often referred to as AC, A/C, or air con) is the process of removing heat and moisture from the interior of an occupied space, to improve the comfort of occupants.
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Alcohol fuel
Alcohols have been used as a fuel.
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Alternative fuel vehicle
An alternative fuel vehicle is a vehicle that runs on a fuel other than traditional petroleum fuels (petrol or Diesel fuel); and also refers to any technology of powering an engine that does not involve solely petroleum (e.g. electric car, hybrid electric vehicles, solar powered).
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Ammonia
Ammonia is a compound of nitrogen and hydrogen with the formula NH3.
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Annual fuel utilization efficiency
The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.
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Audi
Audi AG is a German automobile manufacturer that designs, engineers, produces, markets and distributes luxury vehicles.
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Autogas
Autogas is the common name for liquefied petroleum gas (LPG) when it is used as a fuel in internal combustion engines in vehicles as well as in stationary applications such as generators.
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Avgas
Avgas (aviation gasoline, also known as aviation spirit in the UK), is an aviation fuel used in spark-ignited internal-combustion engines to propel aircraft.
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Biodiesel
Biodiesel refers to a vegetable oil- or animal fat-based diesel fuel consisting of long-chain alkyl (methyl, ethyl, or propyl) esters.
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Biofuel
A biofuel is a fuel that is produced through contemporary biological processes, such as agriculture and anaerobic digestion, rather than a fuel produced by geological processes such as those involved in the formation of fossil fuels, such as coal and petroleum, from prehistoric biological matter.
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BMW
BMW (Bayerische Motoren Werke in German, or Bavarian Motor Works in English) is a German multinational company which currently produces luxury automobiles and motorcycles, and also produced aircraft engines until 1945.
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Brake specific fuel consumption
Brake specific fuel consumption (BSFC) is a measure of the fuel efficiency of any prime mover that burns fuel and produces rotational, or shaft power.
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British thermal unit
The British thermal unit (Btu or BTU) is a traditional unit of heat; it is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.
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Butane
Butane is an organic compound with the formula C4H10 that is an alkane with four carbon atoms.
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Car costs
The car internal costs are all the costs consumers pay to afford owning and running a car.
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Carbon dioxide
Carbon dioxide (chemical formula) is a colorless gas with a density about 60% higher than that of dry air.
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Carbon dioxide equivalent
Carbon dioxide equivalent (CDE) and equivalent carbon dioxide (e and eq) are two related but distinct measures for describing how much global warming a given type and amount of greenhouse gas may cause, using the functionally equivalent amount or concentration of carbon dioxide as the reference.
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Cargo
In economics, cargo or freight are goods or produce being conveyed – generally for commercial gain – by water, air or land.
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Cetane number
Cetane number (cetane rating) is an indicator of the combustion speed of diesel fuel and compression needed for ignition.
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Chemical energy
In chemistry, chemical energy is the potential of a chemical substance to undergo a transformation through a chemical reaction to transform other chemical substances.
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Combustion
Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.
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Controlled-access highway
A controlled-access highway is a type of highway which has been designed for high-speed vehicular traffic, with all traffic flow and ingress/egress regulated.
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Convection
Convection is the heat transfer due to bulk movement of molecules within fluids such as gases and liquids, including molten rock (rheid).
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Corporate average fuel economy
The Corporate Average Fuel Economy (CAFE) standards are regulations in the United States, first enacted by the United States Congress in 1975, after the 1973–74 Arab Oil Embargo, to improve the average fuel economy of cars and light trucks (trucks, vans and sport utility vehicles) produced for sale in the United States.
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Daimler AG
Daimler AG is a German multinational automotive corporation.
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Detergent
A detergent is a surfactant or a mixture of surfactants with cleaning properties in dilute solutions.
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Diesel engine
The diesel engine (also known as a compression-ignition or CI engine), named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel which is injected into the combustion chamber is caused by the elevated temperature of the air in the cylinder due to mechanical compression (adiabatic compression).
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Diesel fuel
Diesel fuel in general is any liquid fuel used in diesel engines, whose fuel ignition takes place, without any spark, as a result of compression of the inlet air mixture and then injection of fuel.
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Diesel–electric transmission
A diesel–electric transmission, or diesel–electric powertrain, is used by a number of vehicle and ship types for providing locomotion.
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Diffusion flame
Glassman,I., Yetter, R.A. (2008) Combustion.
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Distance
Distance is a numerical measurement of how far apart objects are.
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Distributive property
In abstract algebra and formal logic, the distributive property of binary operations generalizes the distributive law from boolean algebra and elementary algebra.
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Drag (physics)
In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction or fluid friction) is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid.
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E85
E85 is an abbreviation typically referring to an ethanol fuel blend of 85% ethanol fuel and 15% gasoline or other hydrocarbon by volume.
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EcoAuto
The EcoAuto Rebate Program was a Canadian government program administered by Transport Canada to provide incentive to people to buy fuel-efficient vehicles, to protect the environment, through rebates.
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Efficient energy use
Efficient energy use, sometimes simply called energy efficiency, is the goal to reduce the amount of energy required to provide products and services.
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Electric vehicle
An electric vehicle, also called an EV, uses one or more electric motors or traction motors for propulsion.
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Electrolysis
In chemistry and manufacturing, electrolysis is a technique that uses a direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction.
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Emission standard
Emission standards are the legal requirements governing air pollutants released into the atmosphere.
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Energy conservation
Energy conservation is the effort made to reduce the consumption of energy by using less of an energy service.
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Energy content of biofuel
The Energy content of biofuel is a description of the potential energy contained in a given biofuel, measured per unit mass of that fuel, as specific energy, or per unit of volume of the fuel, as energy density.
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Energy conversion efficiency
Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms.
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Energy density
Energy density is the amount of energy stored in a given system or region of space per unit volume.
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Energy efficiency in transport
The energy efficiency in transport is the useful travelled distance, of passengers, goods or any type of load; divided by the total energy put into the transport propulsion means.
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Energy-efficient driving
Energy-efficient driving techniques are used by drivers who wish to reduce their fuel consumption.
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Engine
An engine or motor is a machine designed to convert one form of energy into mechanical energy.
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Engine efficiency
Engine efficiency of thermal engines is the relationship between the total energy contained in the fuel, and the amount of energy used to perform useful work.
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Ethanol fuel
Ethanol fuel is ethyl alcohol, the same type of alcohol found in alcoholic beverages, used as fuel.
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Eurostar
Eurostar is a high-speed railway service connecting London with Amsterdam, Avignon, Brussels, Lille, Lyon, Marseille, Paris and Rotterdam.
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Fossil fuel power station
A fossil fuel power station is a power station which burns a fossil fuel such as coal, natural gas, or petroleum to produce electricity.
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Front-engine, front-wheel-drive layout
In automotive design, an FF, or front-engine, front-wheel-drive (FWD) layout places both the internal combustion engine and driven roadwheels at the front of the vehicle.
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Front-wheel drive
Front-wheel drive (FWD) is a form of engine and transmission layout used in motor vehicles, where the engine drives the front wheels only.
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Fuel
A fuel is any material that can be made to react with other substances so that it releases energy as heat energy or to be used for work.
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Fuel cell
A fuel cell is an electrochemical cell that converts the chemical energy from a fuel into electricity through an electrochemical reaction of hydrogen fuel with oxygen or another oxidizing agent.
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Fuel economy in automobiles
The fuel economy of an automobile is the relationship between the distance traveled and the amount of fuel consumed by the vehicle.
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Fuel injection
Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector.
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Full-size car
"Full-size car" is a marketing term used in North America for an automobile larger than a mid-size car.
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Gallon
The gallon is a unit of measurement for fluid capacity in both the US customary units and the British imperial systems of measurement.
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Gas-guzzler
A gas-guzzler, in informal language, is a vehicle that is perceived to consume a lot of fuel.
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Gasoline
Gasoline (American English), or petrol (British English), is a transparent, petroleum-derived liquid that is used primarily as a fuel in spark-ignited internal combustion engines.
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General Motors
General Motors Company, commonly referred to as General Motors (GM), is an American multinational corporation headquartered in Detroit that designs, manufactures, markets, and distributes vehicles and vehicle parts, and sells financial services.
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Gibbs free energy
In thermodynamics, the Gibbs free energy (IUPAC recommended name: Gibbs energy or Gibbs function; also known as free enthalpy to distinguish it from Helmholtz free energy) is a thermodynamic potential that can be used to calculate the maximum of reversible work that may be performed by a thermodynamic system at a constant temperature and pressure (isothermal, isobaric).
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Gross vehicle weight rating
The gross vehicle weight rating (GVWR), or gross vehicle mass (GVM) is the maximum operating weight/mass of a vehicle as specified by the manufacturer including the vehicle's chassis, body, engine, engine fluids, fuel, accessories, driver, passengers and cargo but excluding that of any trailers.
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Haber process
The Haber process, also called the Haber–Bosch process, is an artificial nitrogen fixation process and is the main industrial procedure for the production of ammonia today.
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Heat of combustion
The heating value (or energy value or calorific value) of a substance, usually a fuel or food (see food energy), is the amount of heat released during the combustion of a specified amount of it.
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Honda
is a Japanese public multinational conglomerate corporation primarily known as a manufacturer of automobiles, aircraft, motorcycles, and power equipment.
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Honda Accord
The is a series of automobiles manufactured by Honda since 1976, best known for its four-door sedan variant, which has been one of the best-selling cars in the United States since 1989.
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Hybrid vehicle
A hybrid vehicle uses two or more distinct types of power, such as internal combustion engine to drive an electric generator that powers an electric motor, e.g. in diesel-electric trains using diesel engines to drive an electric generator that powers an electric motor, and submarines that use diesels when surfaced and batteries when submerged.
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Hydroelectricity
Hydroelectricity is electricity produced from hydropower.
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Hydrogen production
Hydrogen production is the family of industrial methods for generating hydrogen.
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Hydrogen vehicle
A hydrogen vehicle is a vehicle that uses hydrogen as its onboard fuel for motive power.
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Imperial units
The system of imperial units or the imperial system (also known as British Imperial or Exchequer Standards of 1825) is the system of units first defined in the British Weights and Measures Act of 1824, which was later refined and reduced.
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Jet fuel
Jet fuel, aviation turbine fuel (ATF), or avtur, is a type of aviation fuel designed for use in aircraft powered by gas-turbine engines.
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Joule
The joule (symbol: J) is a derived unit of energy in the International System of Units.
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Kilometre
The kilometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: km; or) or kilometer (American spelling) is a unit of length in the metric system, equal to one thousand metres (kilo- being the SI prefix for). It is now the measurement unit used officially for expressing distances between geographical places on land in most of the world; notable exceptions are the United States and the road network of the United Kingdom where the statute mile is the official unit used.
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Kilowatt hour
The kilowatt hour (symbol kWh, kW⋅h or kW h) is a unit of energy equal to 3.6 megajoules.
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Kinetic energy
In physics, the kinetic energy of an object is the energy that it possesses due to its motion.
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Life-cycle assessment
Life-cycle assessment (LCA, also known as life-cycle analysis, ecobalance, and cradle-to-grave analysis) is a technique to assess environmental impacts associated with all the stages of a product's life from raw material extraction through materials processing, manufacture, distribution, use, repair and maintenance, and disposal or recycling.
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Lightweighting
Lightweighting is a concept in the auto industry about building cars and trucks that are less heavy as a way to achieve better fuel efficiency and handling.
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Liquefied natural gas
Liquefied natural gas (LNG) is natural gas (predominantly methane, CH4, with some mixture of ethane C2H6) that has been converted to liquid form for ease and safety of non-pressurized storage or transport.
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Liquefied petroleum gas
Liquefied petroleum gas or liquid petroleum gas (LPG or LP gas), also referred to as simply propane or butane, are flammable mixtures of hydrocarbon gases used as fuel in heating appliances, cooking equipment, and vehicles.
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Liquid hydrogen
Liquid hydrogen (LH2 or LH2) is the liquid state of the element hydrogen.
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Litre
The litre (SI spelling) or liter (American spelling) (symbols L or l, sometimes abbreviated ltr) is an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm3), 1,000 cubic centimetres (cm3) or 1/1,000 cubic metre. A cubic decimetre (or litre) occupies a volume of 10 cm×10 cm×10 cm (see figure) and is thus equal to one-thousandth of a cubic metre. The original French metric system used the litre as a base unit. The word litre is derived from an older French unit, the litron, whose name came from Greek — where it was a unit of weight, not volume — via Latin, and which equalled approximately 0.831 litres. The litre was also used in several subsequent versions of the metric system and is accepted for use with the SI,, p. 124. ("Days" and "hours" are examples of other non-SI units that SI accepts.) although not an SI unit — the SI unit of volume is the cubic metre (m3). The spelling used by the International Bureau of Weights and Measures is "litre", a spelling which is shared by almost all English-speaking countries. The spelling "liter" is predominantly used in American English. One litre of liquid water has a mass of almost exactly one kilogram, because the kilogram was originally defined in 1795 as the mass of one cubic decimetre of water at the temperature of melting ice. Subsequent redefinitions of the metre and kilogram mean that this relationship is no longer exact.
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Low rolling resistance tire
Low rolling resistance tires are designed to reduce the energy loss as a tire rolls, decreasing the required rolling effort — and in the case of automotive applications, improving vehicle fuel efficiency.
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Low-carbon power
Low-carbon power comes from processes or technologies that produce power with substantially lower amounts of carbon dioxide emissions than is emitted from conventional fossil fuel power generation.
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Marine fuel management
Marine fuel management (MFM) is a multi-level approach to measuring, monitoring, and reporting fuel usage on a boat or ship, with the goals of reducing fuel usage, increasing operational efficiency, and improving fleet management oversight.
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Methanol
Methanol, also known as methyl alcohol among others, is a chemical with the formula CH3OH (a methyl group linked to a hydroxyl group, often abbreviated MeOH).
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Metric system
The metric system is an internationally adopted decimal system of measurement.
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Micro-g environment
The term micro-g environment (also µg, often referred to by the term microgravity) is more or less a synonym for weightlessness and zero-g, but indicates that g-forces are not quite zero—just very small.
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Microcar
A microcar is the smallest automobile classification, usually applied to very small cars (smaller than city cars).
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Mid-size car
A mid-size car (occasionally referred to as an intermediate) is the North American/Australian standard for an automobile with a size equal to or greater than that of a compact.
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Mile
The mile is an English unit of length of linear measure equal to 5,280 feet, or 1,760 yards, and standardised as exactly 1,609.344 metres by international agreement in 1959.
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Motor fuel
A motor fuel is a fuel that is used to provide power to motor vehicles.
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Multiplicative inverse
In mathematics, a multiplicative inverse or reciprocal for a number x, denoted by 1/x or x−1, is a number which when multiplied by x yields the multiplicative identity, 1.
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NASA
The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.
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Natural gas vehicle
A natural gas vehicle (NGV) is an alternative fuel vehicle that uses compressed natural gas (CNG) or liquefied natural gas (LNG).
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North America
North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere; it is also considered by some to be a northern subcontinent of the Americas.
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Norway
Norway (Norwegian: (Bokmål) or (Nynorsk); Norga), officially the Kingdom of Norway, is a unitary sovereign state whose territory comprises the western portion of the Scandinavian Peninsula plus the remote island of Jan Mayen and the archipelago of Svalbard.
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Oak Ridge National Laboratory
Oak Ridge National Laboratory (ORNL) is an American multiprogram science and technology national laboratory sponsored by the U.S. Department of Energy (DOE) and administered, managed, and operated by UT-Battelle as a federally funded research and development center (FFRDC) under a contract with the DOE.
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Octane rating
An octane rating, or octane number, is a standard measure of the performance of an engine or aviation fuel.
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Outer space
Outer space, or just space, is the expanse that exists beyond the Earth and between celestial bodies.
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Overhead line
An overhead line or overhead wire is used to transmit electrical energy to trams, trolleybuses or trains.
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Pickup truck
A pickup truck is a light-duty truck having an enclosed cab and an open cargo area with low sides and tailgate.
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Poppet valve
A poppet valve (also called mushroom valve) is a valve typically used to control the timing and quantity of gas or vapour flow into an engine.
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Potential energy
In physics, potential energy is the energy possessed by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.
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Premixed flame
A premixed flame is a flame formed under certain conditions during the combustion of a premixed charge (also called pre-mixture) of fuel and oxidiser.
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Propane
Propane is a three-carbon alkane with the molecular formula C3H8.
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Rail transport
Rail transport is a means of transferring of passengers and goods on wheeled vehicles running on rails, also known as tracks.
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Ratio
In mathematics, a ratio is a relationship between two numbers indicating how many times the first number contains the second.
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Rolling resistance
Rolling resistance, sometimes called rolling friction or rolling drag, is the force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface.
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Scandinavian mile
A Scandinavian mile (Norwegian and mil,, like "meal") is a unit of length common in Norway and Sweden, but not Denmark.
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Smart Fortwo
The Smart Fortwo (stylized as "smart fortwo") is a rear-engine, rear-wheel-drive, 2-seater hatchback city car manufactured and marketed by the Smart division of Daimler AG, introduced in 1998, now in its third generation.
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Sphere
A sphere (from Greek σφαῖρα — sphaira, "globe, ball") is a perfectly round geometrical object in three-dimensional space that is the surface of a completely round ball (viz., analogous to the circular objects in two dimensions, where a "circle" circumscribes its "disk").
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Sport utility vehicle
Sport-utility (vehicle), SUV or sport-ute is an automotive classification, typically a kind of station wagon / estate car with off-road vehicle features like raised ground clearance and ruggedness, and available four-wheel drive.
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Spritmonitor
Spritmonitor is a German website that collects and delivers information about the fuel consumption of vehicles under real-life conditions.
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Supermini
Supermini (also called B-segment across Europe) is a class of car larger than a city car but smaller than a small family car.
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Sweden
Sweden (Sverige), officially the Kingdom of Sweden (Swedish), is a Scandinavian country in Northern Europe.
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Thermal efficiency
In thermodynamics, the thermal efficiency (\eta_ \) is a dimensionless performance measure of a device that uses thermal energy, such as an internal combustion engine, a steam turbine or a steam engine, a boiler, furnace, or a refrigerator for example.
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Tire
A tire (American English) or tyre (British English; see spelling differences) is a ring-shaped component that surrounds a wheel's rim to transfer a vehicle's load from the axle through the wheel to the ground and to provide traction on the surface traveled over.
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Toyota
, usually shortened to Toyota, is a Japanese multinational automotive manufacturer headquartered in Toyota, Aichi, Japan.
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Toyota Prius
The Toyota Prius (Japanese:トヨタプリウス)() is a full hybrid electric automobile developed by Toyota and manufactured by the company since 1997.
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Transmission (mechanics)
A transmission is a machine in a power transmission system, which provides controlled application of the power.
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Transport
Transport or transportation is the movement of humans, animals and goods from one location to another.
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Turbocharger
A turbocharger, or colloquially turbo, is a turbine-driven forced induction device that increases an internal combustion engine's efficiency and power output by forcing extra air into the combustion chamber.
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Twinjet
A twinjet or twin-engine jet is a jet aircraft powered by two engines.
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United States Department of Energy
The United States Department of Energy (DOE) is a cabinet-level department of the United States Government concerned with the United States' policies regarding energy and safety in handling nuclear material.
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United States Environmental Protection Agency
The Environmental Protection Agency is an independent agency of the United States federal government for environmental protection.
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V8 engine
A V8 engine is an eight-cylinder V configuration engine with the cylinders mounted on the crankcase in two sets (or banks) of four, with all eight pistons driving a common crankshaft.
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Vehicular metrics
There are a broad range of metrics that denote the relative capabilities of various vehicles.
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Volkswagen
Volkswagen, shortened to VW, is a German automaker founded on 28 May 1937 by the German Labour Front under Adolf Hitler and headquartered in Wolfsburg.
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Volkswagen Group
Volkswagen AG, known internationally as the Volkswagen Group, is a German multinational automotive manufacturing company headquartered in Wolfsburg, Lower Saxony, Germany.
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Weightlessness
Weightlessness, or an absence of weight, is an absence of stress and strain resulting from externally applied mechanical contact-forces, typically normal forces (from floors, seats, beds, scales, etc.). Counterintuitively, a uniform gravitational field does not by itself cause stress or strain, and a body in free fall in such an environment experiences no g-force acceleration and feels weightless.
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Work (physics)
In physics, a force is said to do work if, when acting, there is a displacement of the point of application in the direction of the force.
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Yellow grease
Yellow grease, also termed used cooking oil (UCO), used vegetable oil (UVO), recycled vegetable oil, or waste vegetable oil (WVO) is recovered from businesses and industry that use the oil for cooking.
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Redirects here:
Fuel consumption, Fuel economics, Fuel economy standard, Fuel efficiancy, Fuel efficient, Fuel savings, Fuel use, Fuel-efficiency, Fuel-efficient, Fuel-efficient car, Gas mileage, Km/l, Mile per gallon, Vehicle efficiency, Vehicle effiency.
References
[1] https://en.wikipedia.org/wiki/Fuel_efficiency
