OK - I just took a road trip and filled up 4 times A/C turned off. Both mountain and flat roads. Drove from Phoenix to Las Vegas to St. George, UT. Here is what I got for MPG -

Tank 1 - 12.4
Tank 2 - 12.5
Tank 3 - 14.1
Tank 4 - 14.0

City - 13.5

So lets just say I wasn't overly impressed. I guess I had my foot in it too much. I was really looking forward to what a lot of people were saying they are getting.

There you have it.

pgaduane

 

My first tank in my H3 Alpha around Phoenix but mostly on the valley freeways was 10.1 MPG Most of the driving around 70MPH with maybe 25% of it on city streets at 45MPH with multiple red light stops. Despite the new rules on MPG for the sticker for 2008's, I'd still say they are wildly optimistic at 13/16 for the Alpha. Cerainly the MPG will improve as the engine breaks in but I seriousl doubt that its going to improve by 50%.

 

I hear you. But keep in mind mine is NOT an Alpha. I was hoping for a little more. My Suburban I sold almost got that. So whatever. Still fun to drive and had a good time.

pgaduane

 

Pgaduane, how many miles do you have?

My new 2008 3.7L automatic started out at 15.0 mpg. The lastthree tanks each averaged 17.0-17.5 mpg, nowat 2500 miles. It's been mostly no A/C, 75% freeway, flat driving.

The mileage in my 2003 H2 was 12.5 when I drove it and 11.0 when my wife drove it. I suspect same would be true in the H3, if I let her in it. The difference? She just drives the thing. I become one with the vehicle.

 

I have 2600 miles on it now.

pgaduane

 

I've done a bit better than that on my road trips and around Phx. Most of the driving is around Phx, one trip to KS, CO, UT and back, one trip to LA. Some of the lower amounts include offroading though that usually only lowers it about 1-2 mpg on a tankful of gas. I've averaged 14.49 mpg over the past 10,000 miles with a range of 11.7 to 19.7. Usually with a/c on I get 14.6-14.9 and add 1 mpg with a/c off. This is with airaid intake, Gibson exhaust, pcm tune and a heavy right foot.

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that brings up a a good point when i drive my h3 i getover 17 , my wife gets 16 or less. same in her car, she gets worse milage than i do. I think i unconciously make an effort to drive smooth and save on mpg. It just stems from driving the H# around a lot and trying to maximize mpg.

 

Wow, that MPG sucks... looking at your avatar I noticed you have aftermarket wheels. What size tires are you running?

On my 07 H3 I could get close to 20MPG sometimes over that on the interstate doing the speed limit, fairly flat roads between 700' to sea level. That is with stock tires on a non-adventure with automatic. No speeding, I was getting around 360 miles with a 1/4 tank left, fill it up and it was about 18 gallons so I was right at 20 MPG on several occasions.

Now I have some sweet looking 34" Super Swampers on it and my mileage is horrible, maybe 14-15 on the highway. No telling what local roads are with stop and go.

My point is, your ride looks like it has bigger than stock wheels, if you have big tires forget about decent mileage.

 

HD -

I have 305/55/20's on it. I know it was going to impact the MPG somewhat. So I installed Airaid CAI and a Throttle Body spacer as well. I noticed my city MPG went up a little after installing both engine parts. But I couldn't believe how bad it was. I know that I was in the throttle probably more than I should have been.

Driving from Phoenix to Vegas is a up and down hill 2 lane (at parts) road and when you have an opportunity to pass you floor it because you don't know what's coming around the corner.

I'm sure it would get better if I wasn't in the gas so much, but you have to be. And now I notice what I've read about shifting between 3rd and 4th being annoying. Seemed like everytime I was going up hill, down shift then 2 seconds later back to 4th.

But damn, it still looks and drives great.....

pgaduane

 

My last fill netted 17.2, but the wife did some local errands before heading to work this week. We normally average 18+ with lots of ex'way driving at or below 75mph. Mine has the Adv. Pkg with the oversized tires. I most always keep a light accell foot as there's no real exictement to stomping it.