Thanks guys for the imput , my GC is a gas hog and I dont know why.
it's a 98 with the 4.0 stock gearing and stock size tires and I think I'm getting about 14 -16 combined city/ hiway at best.
I have a hi flow cat, kn filter and a dynomax muffler on it and I never saw any increase in mpg with these changes. I don't drive it like a mad man but it see's a lot of drive time.
My saving grace is that I have a company gas card but if I can get better MPG then I can start pumping the extra gas into my other cars :)
and I'm sure my office manager is going to start questioning the amount of fuel I'm buying with the prices climbing.
Heck with this kind of MPG I should have kept the old pick up !!!