Strange enough, Since I bought the H-3 new a month ago, it has remained steadybetween 17.75 & 17.78 MPG's city/highway combined. Does the 5-speed make that much difference??

 

I average 17.8 mpg with a stock non adventure rig. I actually got 20 mpg on the interstate this last labor day. The gas mileage is very dependent on how you drive.

 

When I had the 285's I got 19 and rarely 20 in highway now with the 35's my last check turned up 15 mpg which was city and offroad.I am gentle on the gas and trying to see the best mpg I could get. It has been a while since i was on the highway-last being the drive to Moab- if I recall I was getting 16.5

 

I just calculated my last tank. I got 15.24 miles to the US gallon. All city driving.

I haven't worked out an average yet, but I do keep track.

 

I am averaging about 17.5 in city/highway driving. It does not seem to make much of a difference between 65 and 75 on my 2007 with Auto.

 

I'm averaging about 16 MPG, thats with 35 muds, exhaust and PCM upgrade from http://www.pcmforless.com/That made a difference with MPG and performance.

 

ok after weeks of getting17.4, this week i got 18.156, nothing changed same driving highway and city. I5 07H3 adventure. milage is just under 3K.

 

I have a 2006 h3 with 41k on it. Auto tranny with a K&N fipk. I average 330-340 miles per 20 gallons of gas. That is primarily in city driving. I took a 300 mile trip to the mountains of PA and averaged 23 mpg on the highway. This was with a ton of up hill driving on the interstate. I got a total of 460 miles out of that tank full. I am very light on the gas as it is a hummer and not a sports car. It will eat gas if you drive it like a sports car.