Originally Posted by
1 Excursion camper
Well I use 87 around town, but when towing I use minimum 89/91 (depending on station)! The first time I towed with it on 87 you could feel the truck surging and kinda weak. The next fillup I used 89 and the X woke up big time! and that wasn`t isolated either. I`ve done it after that to burn up the 87 and the truck runs the same untill I fill up with the midgrade. under load mine needs midgrede minimum.
Glad mine's not like that as I did almost 30k miles of heavy towing last year.