Not only that, but in the US (in my state at least) ethanol is used in gas in the winter to improve emissions - this lowers fuel economy (kind of ironic, isnt it?) and causes car to perform worse.Originally Posted by TWISM
Some companys will use even more than 10%.
"10% of your winter fuel may be grown right here in the USA!
E10 Fuel is created from a 90% mix of gasoline and 10% ethanol.
Regular Gasoline will be discountinued and E10 Fuel will be required in these areas November 1 through February 29:
Oregon State: Clackamas, Multnomah, Washington, Josephine (Grants Pass), Klamath (Klamath Falls), and Jackson (Medford) counties.
Washington State: Clark County, King, Pierce, Snohomish, and Spokane counties.
You will also find ethanol blends at most other retail outlets in surrounding counties simply because it is easier to blend all fuels in one market area instead of blending different fuels to distribute to other sections of the same market."