[mhmitszach]

Originally Posted by Arminius

Going above 10% ethanol risks damage to your car, unless it is made to burn e85. Also, ethanol is not an efficient fuel, so you'll probably get a 25% reduction in FE in percentage of ethanol volume.

http://www.consumerreports.org/cro/c...anol_ov1_1.htm

The more than 10percent is what i wanted to know. thanks much.