over the last 3,000 miles I'm averaging 10.6 MPG with 60% highway driving.

Some are posting much higher. Any thoughts on how to improve mileage?

 

My 05 got 14.7 w/o modifications.

My 06 got 11.7 then I added a catbck and went up to 13.3.

If I drive the speed limit I can get 13.5.

 

with airaid intake, throttle body spacer and flowmaster catback exhaust, sitting on 325/60/20's and all synthetic fluids changed monthly im getting on the highway in the keys where there is no stop lights at 5am, cruise control set at 45 i get 17-19 mpg the whole time, miami traffic im getting around 13 all day long as long as i drive like a human being. im impressed with the gpm im getting in this beast.

 

11.6 M.P.G. Mostly city driving, third row removed but I do have the spare tire on the back and the roof racks. I Run 93 octane w/ the magnacharger.

 

I havent done it yet but,per performance weekly

They say if you put in an after Market super chip, k&w cold air intake and change the muffler to a Flow Thru.........stock tires......will make an 4-8 mile per gallon differance.........
cost is about $1,200.00 for the upgrade............

Rick H2/H3

 

i have done all of that except for the chip, i am going to breathless performance soon and doing an on road dyno and have them change all my computer settings. they say 1-2 mpg better than now and about 30 hp.

 

i am getting around 13.5 in regular traffic and around 16-18 highway depending on how fast I go keep it under 60 I gain millage go over I lose. That's on a 2007 H2 only mod. is and EFI cold air intake fully loaded.

 

I was playing with my DIC (snicker) at a stop light on Saturday and figured I would snap a shot cause this comes up and I have a feeling people don't believe it's possible. I used to be guilty of lead foot hummer driving and only got like 10-11mpg now I get much higher. Only mods I have are air to 40psi on tires, and I removed my roof racks because they were hitting the roof of the garage where I work. '03 H2

 

I'd really recommend higher air pressure to everyone that drives in the city, Your ride won't suffer as these things are tanks and ride pretty nicely regardless. you let your tire have less rolling resistance with will increase mileage, also decrease the chance of hydroplaning in the rain as the center of the tires will be less likely to "straddle" the water. You also will help the tires live longer by giving them the ability to dissipate heat.

You can throw that all out the window in the dirt but for street use try it out and see if your mileage increases. I run 55-60 P.S.I. in 315/70r17 Bridgestone Dueler A/T Revo 2 Load Range E. Not the best tire choice for offroad but they are unbelievable on ice. Back in cali again so next set will probably be the 37" generals.

 

mine is completely bone stock, just drove my Father in Law to the airport today. About 30 miles one way all highway and was sitting right around 16.4mpg almost the entire way. I was pretty surprised!