So some of our local gas stations have started to carry E15 octane 88 gasoline along with regular E10 87, 89, and 93. Is it ok to use E15 in place of E10? My manual for my 09 Focus SE specifically mentions maximum of 10% ethanol (wasn’t planning on running it in the Focus anyway, the price differenc…

Do not use gas with more than 10% ethanol.

That’s what I figured. I’ll happily pay a small amount more for the regular E10. It’s only a 5 cent difference anyway :slight_smile:

While E15 has now been approved by the D.O.T. for over-the-road use, not all vehicles are designed to operate on it. Flex fuel vehicles can operate on up to 85% ethanol, but since your owner’s manual says not to exceed 10%, stick with its recommendation. By the way, I commend you for reading your m…

The only way I’d use E15 in my car is if it was in a flex fuel vehicle what was capable of using E85, and even then, I’d have to do some calculations based on the price and the lower fuel economy to see if it’s worth it.

the_same_mountainbik: By the way, I commend you for reading your manual. Far too many people don’t. Far too many would rather trust strangers on the internet than the written requirements of the manufacturer. I never did understand it. :relaxed: honestly, I’m probably one of the odder ones.…

bravesfan314: I’m probably one of the odder ones. LOL, that’s not a bad thing. I too am odd. When I was a kid I loved to read. I used to sit for hours on end and read encyclopedias… never novels. Even now, I love to read… but never novels. I’m going back through a physics textbook right n…

In addition to your car not being designed for E15, it’ll hurt your mpgs. More ethanol = lower mpgs. E85 caused about a 30% drop, for example.

the_same_mountainbik: When I was a kid I loved to read. I used to sit for hours on end and read encyclopedias Yep, I’ve done that too. I still love reading also, and I’m trying to get my kids bitten by the reading bug too (granted they’re 4 and 3 so they’re pretty much up for anything if you…

[image] texases: In addition to your car not being designed for E15, it’ll hurt your mpgs. More ethanol = lower mpgs. E85 caused about a 30% drop, for example I know, the article even took note of that near the bottom: “One example shows a 2014 Ford Focus getting 32 mpg with regular gasoli…

We don’t even have E85 in Central Maryland. I think E85 is a Midwestern thing, and those that do buy it there do so to help corn farmers. That is a guess, of course, since I rarely get to the Midwest. Maybe Midwestern posters can tell me whether E85 sells much here.

E15 Fuel vs E10 Fuel

Power/Fuel

pyrolord314 January 27, 2017, 9:23pm 6

honestly, I’m probably one of the odder ones. I enjoyed reading the owners manuals when I was a kid, and I haven’t stopped reading them since. I know my grandfather has always appreciated it, because I’ve been able to quickly find the right pages to find parts numbers because I read them so often!

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E15 Fuel vs E10 Fuel

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