I did a 70 mile stint yesterday and got 14 mpg but was into the very rich boost several times.

I did a 120 miles after that fill up and avoided the boost but I haven't gotten a chance to top off the tank yet.

If any one else has calculated mileage what are you getting?

 

So six weeks later and few problems solved that last tank netted 11.4 mpg. There is a cruise up here next weekend that I'm going to "try" and go for a decent mileage number, but we'll see how hard I try.

Anybody else getting mileage numbers yet?

 

My car is in a million pieces so I don't have any numbers but if someone is building a motor and plan to run E85 higher compression ratios will help with the mileage a lot.

 

yeah, becouse we all know how well high compression works with forced induction.

 

^it does if you're looking for boost response and not max power

 

which meet are you going to? starved rock?? I wanna see your car!!!

 

I have an RX-8 that has been E85 converted by myself here in Sweden. Piggyback is a Unichip. I manage 15.7 mpg on a highway at 75 mph. In city traffic it is 12-13 mpg. This was with a base map but tonight i have adjust the afr and add some 3-5 degree of advance timing so i will see next week what the fuel consumotion is. So far pretty satisfied ,except now when it's cold around zero degree celsius it is hard to start in the mornings. Cost for 1 gallon E85 is around $4.70

/Lasse

 

No measurable change so far on my non-RX7. I currently get about 28 mpg all around on a tired ole' 89 240SX. I got slightly less before...but the injectors were extremely clogged initially, so it's hard to say if I have actually lost mileage.

In addition, I tend to run a 50-75% splash blend (E85 as the primary) since I have made no vehicle modification yet. For example, I am still running factory timing since I switch back and forth between fill ups due to lack of E85 in some small towns I travel through.
So I could likely do slightly better with permanently advanced ignition, but likely would get slightly less mileage (or break even) with an actual White Lightning kit/fuel ratio mod coupled with the timing advance. But due to E's steady (no spike) pricing, and the engine cleaning effect it has...it is worth such a loss IMO.