If your vehicle is NOT flex-fuel compatible I do not recommend using E85. Ethanol require more volume and has a lower air/fuel ration for optimal combustion.

Using E85 in a non-flex fuel may result in three possible problems:

1> Vehicle may run poorly, or not at all

2> "Check Engine" or "Service Engine" light may come on for a "lean running" condition. The computer will max out fuel injector output thinking it is running lean, due to ethanol's burning properties. (Flex fuel vehicles have higher output injectors to compensate for this)

3> The ethanol may deteriorate fuel seals and tank coatings, causing a fuel leak, filter restriction, and/or fuel pump failure.

I have heard of people successfully using a 50% mix of ethanol/gasoline with no problems. If you're determined to try, start with 20% and add a little higher percentage each time you fill up until your check engine light comes on, then start backing off.

But I don't recommend it.

Good luck!