A flexible-fuel vehicle or dual-fuel vehicle is an automobile or truck (lorry) that can accept a range of fuel mixtures. A common example is a vehicle that can accept gasoline mixed with varying levels of ethanol (gasohol). Typical cars can run on gasohol that has up to about 15% ethanol (E15), but going beyond that generally requires special engineering. In the United States, many flexible-fuel vehicles can accept up to 85% ethanol (E85). The fuel mixture is automatically detected by sensors, and is used to tune the timing of spark plugs and fuel injectors so that the fuel will burn cleanly in the vehicle's internal combustion engine. A small variety of cars, the most popular kind of automobile. ... The driver of a car transporter truck prepares to offload Skoda Octavia cars in Cardiff, Wales For further uses of the word truck, see Truck (disambiguation). ... For the workstation, see SGI Fuel. ... Petrol (gasoline in the United States and Canada) is a petroleum-derived liquid mixture consisting primarily of hydrocarbons, used as fuel in internal combustion engines. ... Ethyl alcohol, also known as ethanol or grain alcohol, is a flammable, colorless chemical compound, one of the alcohols that is most often found in alcoholic beverages. ... The use of alcohol as a fuel for internal combustion engines, either alone or in combination with other fuels, has been given much attention mostly because of its possible environmental and long-term economical advantages over fossil fuels. ... A sensor is a technological device or biological organ that detects, or senses, a signal or physical condition. ... This article or section should include material from Spark gap A spark plug is an electrical device that fits into the cylinder head of some internal combustion engines and ignites compressed aerosol gasoline by means of an electric spark. ... Fuel injection is a technology used in internal combustion engines to mix the fuel with air prior to combustion. ... A colorized automobile engine An internal combustion engine is an engine that is powered by the expansion of hot combustion products of fuel directly acting within an engine. ...