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Old 09-02-2014, 02:36 AM   #12 (permalink)
tyronasauras
EcoModding Lurker
 
Join Date: Jul 2014
Location: MI
Posts: 54

grey panther - '02 Mercury Grand Marquis
Team Panther
90 day: 27.15 mpg (US)
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Quote:
Originally Posted by roosterk0031 View Post
Usually the extra mgp isn't worth the extra money. When I got the cobalt 2 years ago I used E0 to try for big numbers, 2 years ago same time of year 44.99 3-tank, last 3 tank on E10 was 43.7. I think the is pretty close to normal. I think there is a 3% energy content difference so it would be normal to expect that difference.
I think for E10, there is a 15% BTU hit for the ethanol, but at 10% of the total, it would be just a 1.5% BTU hit/gal. My estimate for my car would be not more than a .5 MPG loss. I could be wrong on my info though. Non Ethanol is readily available here without much of a price difference, so I prefer it.
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