Did you know that FiTech EFI systems support E85? All of the seals in our fuel injection systems are made of Viton which are impervious to ethanol corrosion. Be sure that the rest of your fuel system can handle that ethanol and you can run it! Changing the values in your EFI system are easy with our handheld controller under the engine setup section. Change the ethanol content percentage to 85, or if you know the exact ethanol percentage of your gasoline, change it to your exact preference. From