I too have not seen much in the way of fuel mileage increase. I can take it as easy as humanly possible and have only seen about 18mpg. Perhaps adding a free-flowing exhaust would help a bit?
So you or a friend had a catastrophic failure within hours of putting on a set of H2's and you wanted proof that it wasn't the wheels. I apologize if I'm a bit slow today, not feeling to well. I have the H2's on my rig and all is good, asside from the ball joints all not looking to healthy -...
Just picked up a very very clean set of Hummer H2 chromies off a (cough cough) Dodge diesel site member for $375 shipped
and a brand new set of BF Goodrich ATKO's in LT265/70/17 load range E. Looking forward to getting everything mounted up in the next week or so. I'll be sure to post up...
Well, I got my Diablosport Predator last night, loaded it up and all I can say is WOW. Night and day difference. Going to straight pipe my stock exhaust for now to help with the EGT's. Just filled her up and going to light foot it for the next few tanks, which I do most of the time anyway...