U know I believe it will do E85 mix quite well since it blows black suet onto the drive when warming up it has the capability to map the fuel mix for the higher octane mix of 50/50 mix. I have found that when E85 is near $.50 less then gas it is equivalent in cost to operate and I get better torque on very hot days approaching 100 degrees or higher. If it didn't run it perty well it would start very hard.