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Ethanol also replaces toxic, air-polluting substances such as benzene, toluene, and xylene. Numerous states require certain ethanol blends to reduce air pollution. Ethanol produces about 34% less air pollution than gasoline on average. [32] As of 2016, ethanol blends in the U.S. reduce emissions of carbon dioxide by about 40 million tons per year.
The 85% limit in the ethanol content was set to reduce ethanol emissions at low temperatures and to avoid cold starting problems during cold weather, at temperatures lower than 11 °C (52 °F). [116] A further reduction in the ethanol content is used during the winter in regions where temperatures fall below 0 °C (32 °F) [ 117 ] and this ...
Specially equipped vehicles designated as Flex Fuel capable can run on E85, a mix that's as high as 85% ethanol and just 15% gasoline. But, nearly all cars are already using a gasoline-ethanol mix.
As ethanol fuel economy is lower than gasoline because of ethanol's energy content is close to 34% less per unit volume than gasoline, [90] [91] [92] flex cars running on ethanol get a lower mileage than when running on pure gasoline. However, this effect is partially offset by the usually lower price per liter of ethanol fuel.
For each billion ethanol-equivalent gallons of fuel produced and combusted in the US, the combined climate-change and health costs are $469 million for gasoline, $472–952 million for corn ethanol depending on biorefinery heat source (natural gas, corn stover, or coal) and technology, but only $123–208 million for cellulosic ethanol ...
15. Check Tire Pressure. Having underinflated tires can lower your gas mileage and cause you to lose about 3 cents per gallon, according to the U.S. Department of Energy.To find the proper tire ...