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Ethanol content
In the U.S., the average ethanol content in gasoline has been consistently around 10% by volume, primarily due to the Renewable Fuel Standard (RFS) which mandates the blending of renewable fuels into transportation fuel.
The SGS WWFS data shows that, on average, gasoline samples have complied with the 10% v/v ethanol content standard.
Ethanol content in gasoline samples %v/v
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Ethanol content