How much ethanol in US gasoline?
How much ethanol in US gasoline?
(OP)
Recall that EtOH replaced MTBE as a gasoline oxygenate in ozone non-attainment areas several years before the mandate to replace 10% of the petroleum component nationwide with ethanol. I have been given to understand that oxygenate requirement is IN ADDITION to the E10 base, so many metropolitan areas may be running closer to 15% ethanol. Can anyone knowledgeable confirm or comment?





RE: How much ethanol in US gasoline?
RE: How much ethanol in US gasoline?
RE: How much ethanol in US gasoline?
RE: How much ethanol in US gasoline?
Among other sources: http://en.wikipedia.org/wiki/Gasoline
Because ethanol is volatile and can contribute to smog, I am dubious that it would be an additional requirement above any base ethanol amount. A 10% ethanol fuel would already conform to CA summer formulations. However, I couldn't readily verify that anywhere.