What are some ways i can get better gas miles on my H?

 

Clean air filter, use synthetic motor oil, and make sure your tires are fully inflated..........I have mine at 38PSI. Take it easy starting out
from a stop cuz the 3 is heavy and you should see an improvement. You could always slow down a tad on the eway, the brick shape doesn't help there.

 

The times are a changing!

The good news is that you can now buy a pretty goodDVD player for the cost of one tank of gas... bad news is thata tank of gas costs as much as a good DVD player...

I have been feeling REALLY good these days and no longer second guess my decision to go with a FULLY loaded H3x (DVD players, the works) over standard equiped H2... Feeling good about that choice now...every week!

 

+1 to Doc's points. Light on the pedal and 65 MPH on the freeway does me the most good.

 

+2 to Doc's points. Light pedal will be your biggest MPG increase, especially in this heavy H3. And the highway MPG drops off huge with speed. I keep my tires at 36 psi, keep the air filter clean, use synthetic engine oil (haven't changed tcase yet). Roof racks and bars also decrease MPG.

 

Some chip on my friends dads car made him get 21 mpg on his 06' 2500 chevy duramax is that because his is a diesel? or can you do it on any car?

 

Gas engines and Diesel engines are totally different animals. A performance chip can transform a diesel engine into a completely different beast! You can achieve huge HP & Torque gains along with better fuel mileage with the correct tunes. Oversize tires and speed are the #1 killer in fuel consumption with any vehicle.

 

I usually drive 75-80 HWY and average around 13.5-14 MPG. This week I found a different route to work that is back roads, actually faster but only drive about 50-55 on it now. So far I'm at 170 miles and haven't quite hit half a tank yet.

 

Any thoughts or facts on installing less restrictive exhaust to improve gas mileage?

 

Not sure how much you would gain by doing that, and you may have to worry about state inspection and/or noise pollution(Jersey has laws for both). Just keep anything that you don't need out of the Hummer and keep tires inflated properly.