The cost of E85. I want to pay for a OFT Tune, but for which Fuel Type?

[StatusIsChecked]

I have been running E85 on Open Flash Tablet for a few months, it's been alot of fun. However, in Texas, the price of E85 is $3.00\g and 93 is $3.50\g. E85 used to be much cheaper.
The problem is my car seems to be guzzling E85, why is that? I also want to pay for a custom tune soon. Should I do that using 93 Fuel instead for price of gas and reliability? If E85 is so expensive and harder to find, do I want to spend time buying a tune for E85?

[86TOYO2k17]

E85 requires approximately 30-35% more fuel, so your gas mileage will drop roughly 30-35%. A custom tune would probably help as the OFT tune is probably on the richer side overall compared to a custom tune further dropping gas mileage.

You should get flex fuel custom tune so whatever 93, E85 or any ethanol % blend will have the tune automatically adjust. So you can just fill with whatever and not worry about it.

E40 is equivalent to about 100 octane, and will have a much less detrimental effect on gas mileage vs E85 while still providing phenomenal gains/benefits.
True E85 should be about 6gallon 93 to 5gallon E85 for E40 blend.
This might provide you with best of both worlds.

[Qwimby1]

Keep an eye on E85 availability. Not sure how many places you can get it in your area, but where I am there was only one station close by and it just stopped selling it. The closest station now is a 30-mile round trip.