Study Finds That Higher Ethanol Blends Result in Improved Energy Efficiency in Flex-Fuel Engines, Partially Offsetting Reduced Energy Density of Fuel
Green Car Congress
OCTOBER 12, 2009
A study of flex-fuel vehicles operating on different ethanol blends (E10, E20, E30, and E85) found that higher ethanol blend ratios provide better energy conversion within the engine. The E85 fuel blend consumed fewer BTUs per mile than all other ethanol fuel blends evaluated. It just depends on fuel prices at the time.
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