Quote:
Originally posted by Craig911
Running 10% ethanol blend gasoline will result in a reduction of 1-2 mpg, and a theoretical increase in octane of just over a point.
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The common figures are 3% reduction in fuel economy for E10 blend. Therefore, 1 mpg on a 33mpg car. The differences are typically so low most wouldn't notice.
Blend E10 is how most gas goes from 87 octane 'regular' to 89 octane 'plus'.