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Old 07-09-2012, 10:39 AM   #521
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Update: The E0 93 fuel didn't noticeably increase my gas mileage over the E0 91. In fact, I think it went down (it was a different brand of gas, not sure how much that matters).

EDIT: Why haven't I just bought a damn scangauge already?
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Old 07-11-2012, 01:57 PM   #522
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I just filled again with 105 octane E85 on the north side of Minneapolis and drove 268 miles to north west Iowa. Drove 70 mph with air conditioning on most of the time with a few miles with a slight headwind. There were a few towns and stop lights along the way. Filled up close to home and got 31.6 mpg.
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Old 07-11-2012, 02:01 PM   #523
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Too much octane will waste fuel. The unburnt fuel will go right out your tailpipe.
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Old 07-11-2012, 02:03 PM   #524
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Quote:
Originally Posted by cessna1 View Post
I just filled again with 105 octane E85 on the north side of Minneapolis and drove 268 miles to north west Iowa. Drove 70 mph with air conditioning on most of the time with a few miles with a slight headwind. There were a few towns and stop lights along the way. Filled up close to home and got 31.6 mpg.
That seems exceptional for using E85. Was it a tank-full?

I tried E-85 when I was living in Colorado for two reasons: A. it was much cheaper; B. I was told that I would gain HP through its use. All I really noticed was the fuel gauge moving a lot faster than with normal petrol.
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Old 07-11-2012, 02:08 PM   #525
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E85 can have up to 33% less energy content, so you're not likely to gain any power through its use. The only advantage I see is reducing our dependence on Middle-Eastern oil. But the stuff is not good for engines, fuel systems or MPG.
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Old 07-11-2012, 03:00 PM   #526
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Quote:
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I just filled again with 105 octane E85 on the north side of Minneapolis and drove 268 miles to north west Iowa. Drove 70 mph with air conditioning on most of the time with a few miles with a slight headwind. There were a few towns and stop lights along the way. Filled up close to home and got 31.6 mpg.
Do you log on fuelly?
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Old 07-11-2012, 03:02 PM   #527
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The only advantage I see is reducing our dependence on Middle-Eastern oil.
Cessna is a corn farmer in a town with 2 ethanol refiners, so it directly benefits him to use e85
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Old 07-11-2012, 03:12 PM   #528
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Quote:
Originally Posted by WizardSkills View Post
That seems exceptional for using E85. Was it a tank-full?

I tried E-85 when I was living in Colorado for two reasons: A. it was much cheaper; B. I was told that I would gain HP through its use. All I really noticed was the fuel gauge moving a lot faster than with normal petrol.
When the car was new, the dealer filled with E10 and I started adding E85 as soon as I could. A little over 2000 miles on the odometer now and just about all E85. This is summer blend so it is close to 85% ethanol but winter is closer to 70% because summer blend is to low of vapor pressure thus poor starting qualities.
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Old 07-11-2012, 03:20 PM   #529
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31.6MPG on E85 is about right for a full tank on predominantly fwy driving. I average about 37 under the same conditions on my rank old '02 using E10. So, if the new car will get about 39/40 highway using E10, this is right in the ballpark for E85.
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Old 07-11-2012, 09:36 PM   #530
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Why is that?

Quote:
Originally Posted by dyn085 View Post
Too much octane will waste fuel. The unburnt fuel will go right out your tailpipe.
Higher octane gasoline reduces pre-ignition, not ignition is the way I understand it.
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