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My E85 Ethanol Gas Mileage :)

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Old 05-23-2007, 12:41 AM
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Again, this wasn't easy driving... it was kidnda goofin off in a way I just filled up and am going to drive this week without gaggin or bein hard on it. Just gonna cruise around and see how that works.
Old 05-23-2007, 03:21 AM
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brick, im from off of grandparkway by cinco ranchish....

as far as the thread, i doubt youll se much power gain from E85 but who knows. theres a few krogers around houston that have it now.
Old 05-23-2007, 08:51 AM
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Alot of Katy guys here. lol

I really like the E85. Its 105 octane so yes it will get less milage in our low compression motors, but if you ran a motor with 11:1 you would get as good as stock milage. The high compression takes agvantage of the higher octane where the lower compression cant effeciently use the higher octane. E85 is also a much cleaner burning fuel and has nearly no deposits like gasoline.
Old 05-23-2007, 09:23 AM
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can someone tell me if my truck is fuel flex and can run e85? its a 2003 avalanche 5.3L
Old 05-23-2007, 09:36 AM
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I took a trip over the weekend with the idea of runing E85 the whole way. The first tank got me 17.4mpg. After that tank I ended up putting 5 gallons of premium back in to get me to the next E85 station since the one I stopped at when I was real low had run out of E85. After that though I refueled with E85 and have been getting what I would guess to be around 16-17mpg still. There was alot of highway driving on the first tank, about 80%. Since then I've been running alot of everything kind of driving. After gas prices went up 30 cents in one day around here I plan to keep running it and tune for it.
Old 05-23-2007, 11:22 AM
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Originally Posted by zippy
I took a trip over the weekend with the idea of runing E85 the whole way. The first tank got me 17.4mpg. After that tank I ended up putting 5 gallons of premium back in to get me to the next E85 station since the one I stopped at when I was real low had run out of E85. After that though I refueled with E85 and have been getting what I would guess to be around 16-17mpg still. There was alot of highway driving on the first tank, about 80%. Since then I've been running alot of everything kind of driving. After gas prices went up 30 cents in one day around here I plan to keep running it and tune for it.
17.4mpg compared to what on gasoline?

Does anyone know what E85 goes for in thier area?
Old 05-23-2007, 11:30 AM
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Check this site:

http://e85prices.com/
Old 05-23-2007, 12:45 PM
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Originally Posted by Jeff12
can someone tell me if my truck is fuel flex and can run e85? its a 2003 avalanche 5.3L
i believe if you check the 8th character of your VIN and its a Z then its flex fuel
Old 05-23-2007, 01:00 PM
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Originally Posted by Black04HD
i believe if you check the 8th character of your VIN and its a Z then its flex fuel
dangit. mines a T
Old 05-23-2007, 01:26 PM
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I just looked and there's a bunch of stations here in town! There's on my way home from work too. $2.65/gal

So basically with 91 octane at $3.19/gal here at 17mpg I would break even if I get around 14mpg with E85.

Zippy, what did you do to tune it exactly? What's your target AFR while cruising and at WOT?


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