? for those who have the Trail Jammer
Ive been reading up on these and have found alot of info on their effects on performance and mpg but I havent read anywhere if you need to run Premium fuel with their computer of if 87-89 octane is o.k.
2004 Wrangler X 4.0
2000 Cherokee Sport 4.0
1992 Dakota Sport 5.9
1971 Pontiac Firebird