Hey guys, So I have had my Evo for just under a year (bought it brand new) and I have always used 94 octane fuel. The gas stations that carry 94 are kinda far from where I work and live. Do you think I should keep driving a little more to pump 94 or will it be fine just pump 91 octane? I don't have a tune or many mods (Just an ETS catback exhaust). Any advice would be much appreciated.

 

Shoulda just got 91 from the start you wasting $$$$ running to get better gas that cost more then 91 if all you got is that catback says premium on the gas tank door so that could mean 89 that be pushing it but 91 your fine till you do more work an tune your car to run on 93 octane

 

^ what he said. I dont think running fuel higher than 91 on an untuned evo will make that much difference. Correct me if im wrong

 

91 would be his best 94 you just burning $$ out that catback son...I dislike ethanol soo I use star-tron ethanol treatment an it makes a difference I"m running stage 2 93 give it a try