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Old 09-12-2013, 07:43 PM   #1
Desmo748
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Running E85

Just a FYI for all. Tried running with the E85 down here in South Ga, seems to be peppy with it, tossed it into the tank with about 1/8th left of 93. 93 oct was getting me about 31-33 mpg running back and forth to work. with the E85 its pretty consistent at 25mpg. Besides having cravings for popcorn when i get to where i am going, (and 6-8 mpg less) I'm not disappointed with it. It actually seems to be smoother at times. 1st tank so I'll post more info if anyone wants as i try it for a few tanks to get a clearer picture.

1 thing i did notice with the 93, is that after getting on the gas for a fast acceleration then hitting my target speed it seemed to hang out for 5-10 seconds before deciding to shift to a higher gear. The E85 almost shifts instantly after letting off the gas under the same conditions.


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Old 09-12-2013, 10:02 PM   #2
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Up here, the difference in cost is only twenty cents a gallon, so I have been reluctant to try - given the dramatic decrease in MPG. Your performance observations are interesting though. Makes some sense I guess considering your burning 15 percent alcohol - right? Would that be like 100 octane?
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Old 09-12-2013, 10:09 PM   #3
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Quote:
Originally Posted by rjhansen View Post
Up here, the difference in cost is only twenty cents a gallon, so I have been reluctant to try - given the dramatic decrease in MPG. Your performance observations are interesting though. Makes some sense I guess considering your burning 15 percent alcohol - right? Would that be like 100 octane?
E85 is generally right around 93-95 octane depending on the base gasoline used. But it's not closely regulated or controlled.
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Old 09-12-2013, 10:32 PM   #4
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Up here, the difference in cost is only twenty cents a gallon, so I have been reluctant to try - given the dramatic decrease in MPG. Your performance observations are interesting though. Makes some sense I guess considering your burning 15 percent alcohol - right? Would that be like 100 octane?
You've got it backwards.

85 percent ethanol, 15 percent gasoline, usually 85~ octane crap.

If it were more regulated I'd go with E85. There's a few places on my way to/from work that carry E85, and the discount is usually about $.50/gal which still doesn't overcome the 25%+ efficiency loss. :-\
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Old 09-12-2013, 11:01 PM   #5
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You've got it backwards.

85 percent ethanol, 15 percent gasoline, usually 85~ octane crap.

If it were more regulated I'd go with E85. There's a few places on my way to/from work that carry E85, and the discount is usually about $.50/gal which still doesn't overcome the 25%+ efficiency loss. :-\
Thanks for the clarification!
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Old 09-13-2013, 07:32 AM   #6
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filling up at a BP station where E85 is about 40 cents less than the 93 i was using and about 15 cents more than 87. Tag on the pump claims "104 octane" if anyone was wondering.
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Old 09-13-2013, 07:52 AM   #7
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I've been flipping through Google and no one states an octane level lower than 100. The highest I could find was 108. You can't tell me that all of these articles are false. I recently switched back to 93octane this morning after running e85 for a few months just to see the difference.
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Old 09-13-2013, 08:18 AM   #8
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Quote:
Originally Posted by suss6052 View Post
E85 is generally right around 93-95 octane depending on the base gasoline used. But it's not closely regulated or controlled.
False. It is closely regulated and controlled. Most places won't take it less than E75.

Quote:
Originally Posted by Slo86GT View Post
You've got it backwards.

85 percent ethanol, 15 percent gasoline, usually 85~ octane crap.

If it were more regulated I'd go with E85. There's a few places on my way to/from work that carry E85, and the discount is usually about $.50/gal which still doesn't overcome the 25%+ efficiency loss. :-\
you have it wrong. E85 is actually around 103-104 octane consistently. E85 burns 30% hotter, but it is about 20% less efficient. but it is far higher octane rating.

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filling up at a BP station where E85 is about 40 cents less than the 93 i was using and about 15 cents more than 87. Tag on the pump claims "104 octane" if anyone was wondering.
yea, exactly.


OP, did you get a new tune? usually to take full advantage you should get a tune for it.

i know on my car i needed to add way larger injectors. and get a new tune.
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Old 09-13-2013, 08:42 AM   #9
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OP, did you get a new tune? usually to take full advantage you should get a tune for it.

i know on my car i needed to add way larger injectors. and get a new tune.
And I new fuel pump for you sir. I had one on my evo and you should get your self one if your thinking about it engine runs cooler more boost big hp and tq gains
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Old 09-13-2013, 08:50 AM   #10
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And I new fuel pump for you sir. I had one on my evo and you should get your self one if your thinking about it engine runs cooler more boost big hp and tq gains
I have a bigger fuel pump. DW65c and ID1000 injectors. Tried and true set up for a stock turbo car. I have a fuel cell being built right now for big turbo.
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