O.K. this is going to sound stupid
but it is something I just discoverd. First 7,000 on the truck I was seeing in the 17-18+ MPG (this is good I was happy). Next I took a 5,000 mile trip went for Chattanooga to Colorado around and back. Had 2 Kayaks and 3 Mtn. bikes on the top of the truck. The fuel milage went down. This did not suprise me, but when I got back my milage stayed in the 14-15. I was a bit confused by this. Today I realized that I had put more air in the tires. I went from 28 ish to 36-37 psi. Had a load etc so I wanted to make sure I was coverd. Today I went back to 28ish and I am seeing my milage going up. Only put about 50 miles since I droped the pressure but I am quickly watching my average go up
. If some one else out there has low milage and is runing 18" wheels I would like to see you try this and see what it does.
Tom