Who here has done this and what are your results?

from what I gather, an increase in power and a decrease in mpg. Wondering if the offset of the cheaper price offsets the lessened mpg.

Around here, E85 is about .30 or better a gallon cheaper than 87. 93 around here can be .75 or better more expensive than 87. I know we run 87 but when tuned on a 93 tune this could make a substantial savings to run E85 instead of 93.

I know these stations are far and few but we have a new one not far from me and with a 36 gal tank, this might be something to consider.

 

By typing into Google this line: site:f150forum.com e85 you will find over 1,200 posts about this.

In short - E85 needs to be about 30% cheaper than 87 to account for the drop in MPG you will get (people say 4, 5-7...). And, if it's cold, E85 often can have problems.

I don't know that anyone compared a 93 tune with E85 and did the math, but if you the impact on MPG of using the 93 tune vs. 87 without a tune you could then do the math.

 

On previous trucks I have found you need about 50-60 cents a gallon cheaper than 87 to make it worth while. And never in the winter

 

I don't know about the 5.0 but my 2.7 says no more than 20% ethanol. Personally even if I could use E85 I wouldn't! no matter the price difference. I've seen what it can do to gas pumps that are made for E85.

 

flex fuel only vehicles, hence the 5.0 in the post

 

I wouldn't trust the stuff myself.

 

Now going the other way...

Does anyone occasionally use 89 or 93 without a tune? Any advantage for towing or hauling? Just curious.

 

I run 93 in mine right now with gas so cheap. Towing I can tell a difference and even not towing I can tell. It holds the gears better on hills and has more pep with 93. I have run e85 before and the extra power is not worth the way worse mileage.

 

I have not noticed any difference with from 87 to 89 to 93. I do get better mileage using non ethanol gas. There again didn't notice any difference from 87 to 90 on the non ethanol.

 

Hrrmmm... I think either way I'm going to stay with 87 for the foreseeable future. I'm barely halfway to 1000 miles so I think I ought to wait until its "broken in" before I start experimenting.