What is the effect of 10% ethenol on octane rating

Asked by DaveRas May 26, 2013 at 04:56 PM about the Honda Crosstour

Question type: Maintenance & Repair

2 Answers
177,545

tenspeed answered 11 years ago

Because ethanol has an octane rating of 113, adding 10% ethanol to gasoline raises the finished fuel's octane rating by 2 or 3 points, improving the fuel's performance.

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DavidH25 answered 11 years ago

I posted something prematurely. and upon further research discovered tenspeed's source of information is better that mine, more trustworthy and I deleted it. I had disagreed, but was wrong.

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