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The result is number of miles the vehicle travels on alternative fuel for the same cost of a single gallon of gasoline. The end computation results in MPG unit and is directly comparable to a standard internal combustion engine vehicle's fuel costs for its rated MPG.
According to the Energy Information Administration (EIA), as of March 2022, factors that affect the price of gasoline in the United States include the price of crude oil per barrel, costs and profits related to refining, distribution, and marketing, and taxes, along with the charge set by refiners for gasoline based on based on octane levels, with higher octane levels—premium grade cost ...
(This is given by the change in Gibbs free energy, and is around 45.7 MJ/kg for gasoline.) The actual amount of mechanical work obtained from fuel (the inverse of the specific fuel consumption) depends on the engine. A figure of 17.6 MJ/kg is possible with a gasoline engine, and 19.1 MJ/kg for a diesel engine.
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A diesel cycle engine can be as much as 40% to 50% efficient at converting fuel into work, [2] where a typical automotive gasoline engine's efficiency is about 25% to 30%. [3] [4] In general, an engine is designed to run on a single fuel source and substituting one fuel for another may affect the thermal efficiency.
Fuel consumption monitor from a 2006 Honda Airwave.The displayed fuel economy is 18.1 km/L (5.5 L/100 km; 43 mpg ‑US). A Briggs and Stratton Flyer from 1916. Originally an experiment in creating a fuel-saving automobile in the United States, the vehicle weighed only 135 lb (61.2 kg) and was an adaptation of a small gasoline engine originally designed to power a bicycle.
On average, it costs half as much to drive an electric vehicle, according to the U.S. Department of Energy -- and that's presuming a cost of $2.85 per gallon. But with gas prices now averaging ...
[98] The Associated Press said premium gas—which has a higher octane rating and costs more per gallon than regular unleaded—should be used only if the manufacturer says it is "required". [99] Cars with turbocharged engines and high compression ratios often specify premium gasoline because higher octane fuels reduce the incidence of "knock ...