e85

certain times of the year...you e85 at the pump and certain times of the year you get e70 at the pump....summer time is e85...winter is e70...which is easier to start in cold weather...

http://www.e85mustangs.com/regions123.html


also some good info at this link..even though it is a rustang

http://www.e85mustangs.com/tuning.html