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E-85~! in jacksonville!

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I have run E85 before and I got at least 25% worse gas mileage. I would think that if your running 1K or larger injectors that your putting a lot more fuel in so you would get lower mpg.
BTW I also got E85 in Lake City and it was cheaper than regular, but I got like 15mpg with it. I think it's a whole different situation if you are tuning for it, I was just posting my results with it.
 
I tried it in my Suburban that was FFV and I went from 18mpg down to 13mpg. I was very meticulous with watching my fuel mileage, and still am, and I noticed that my mpg just nose dived. I did it for a couple tanks and it more or less balanced out with regular fuel when you take in going out of the way to fill up with E85 and the cheaper cost vs poor mpg.

I personally haven't tuned for E85 on the DSM but with the size of injectors and the fact that you are making more power then I would think mpg would go down...
For me I only get about 240 miles on a tank (about 20mpg) in the DSM so I don't want my mpg to go down anymore!
 
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