14.5 MPG's!!!

[Escondido]

Just completed the break in trip for the '07 after putting 93K on my '03. Took a road trip to Crested Butte and used the miles to do some testing on the gas mileage. Surprisingly, we actually found the sweet spot in the winding roads betwees Santa Fe and Gunnison. During that stretch we averaged 65 MPH's and was consistently under 2K rpm's. Our mileage was 14.5 mpgs. Thought we had written something down incorrectly but reconfirmed it on the return trip.

Now that we have found the sweet spot I will have to retrain my foot if I want better mileage.

I can hardly wait to tell some of these people that I got 14 mpgs and watch them stammer. Of course I wont be able to keep up the average but we did seem to do a little better than my '03.

[KONG]

I agree with you, the h2 does have a sweet spot. I get 16-17 mpg but I dont bother telling anyone either because no one beleives. I just got back from a trip to New Mexico myself. The trick is like you said, Keep it under 2000 rpm. a Power Programmer helps too.. with this I do about 75-80 mph

[working Hummer]

16-17, ya right.:lame:

[KONG]

see what I mean. nobody believes.:twak:

[BlueHUMMERH2]

I directly calculate the MPG using a full tank, reset the trip meter, and then fill the tank again (preferably at the same station and pump) and then use the gallons that go in to figure the MPG.

I find that the trip computer lies. Best I've ever gotten in the winter was just pushing 15 MPG on level interstate going 60MPH. I'm going to take a closer look this summer at the warm MPG. But if you're going downhill, with a tailwind, you'll probably get upwards of 17MPG. :D A programmer would definately help!

[HUM GOOD]

My problem is I CAN'T DRIVE 55 !!!

[DDWH]

:yawn:

[Steve - SanJose]

65mph, 55mph, no thanks. Too slow.

[kom]

It works! I just did a quick trip to Pasadena and back (about 55 miles) and I ended up averaging 15.1 mpg by keeping it at 65 mph (2k rpm).:excited:

[KONG]

I told you, Now try it with a power programmer, then you would be able to go 75 mph at 2500rpm. and you will average 16-17 mph. I tell you guys no lie....

[zmanH2]

I was doing 15.5 mpg (full tank reset) yesterday until we hit traffic. This is the highest I have seen on my rig. Now the computer is at 12.7 mpg after half a tank.

[Hummer Aficionado_VT]

I would never of thought it possible...
:jump:

[Motohead]

I told you, Now try it with a power programmer, then you would be able to go 75 mph at 2500rpm. and you will average 16-17 mph. I tell you guys no lie....

I think at "16-17 mph" you might get that kind of mileage...

[KONG]

oh sorry its 16-17 mpg

[Steve - SanJose]

go granny go...

[Captain of the Titanic]

I managed 16.2 (on the dash) for 60 miles on the highway. Going EXACTLY 60 without hitting any slow downs.

30 miles of city later it was 10.8.

It's possible to get good numbers, just not for any length of time in the city. (Or driving like you're under the age of 70).

[mdoyle]

If you guys are going to talk mileage, it should only be (x) miles / (x) gallons. Looking at the instant mileage readout isn't a true indicator of total mileage, but it's a useful tool for finding the so called "sweet spot".

No, not THAT "sweet spot" :giggling:

[DDWH]

I can't drive 55!!!:jump:

[KONG]

I look at the average MPG. and for me, well,,, thats good enough. See we all have to buy gas and everyone that buys a hummer or knows about hummer knows that hummer is not the best in gas so we accept it when we buy and accept it when we go to the pump. I am pleased to see that I AVERAGE 16 mpg and I dont have to prove it to nobody.

[Steve - SanJose]

I can't drive 55, 60, or 65 around here very often.

[finbox]

That trip computer lies like a SOB, if you are stating your #'s from it, it's not worth posting.

[MarineHawk]

I know most of the handhelds just change shift points and pressure transmission wise. They may increase fuel efficiency in other ways, but they won't change the rpm you are pulling for a set speed.

Yes, they are magic. They will also make your tires bigger and your lift higher.

[Vettster]

Driving downhill that is.
When I turn around and have to go uphill, I get 6.


It averages out to 12.:D


Drive Safe,
Vettster

[Escondido]

Numbers I quoted were based on fuel used and actual mileage. No tricks from the computer, I never believed the readings on my '03. I too can't drive 55. I was just suprised by the results on a portion of my trip. I had never dissected the different impacts before but the road trip provided a great opportunity. If I could figure out how to keep it below 2k rpms while keeping up with the traffic that sure would be nice. Unfortunately 80 is just keeping up on I-10.

[obzidian]

anyone ever hear of a gearvendor. i know its something noone might even consider, however, its a cool transfer-case unit that splits your gears.

For example, your traveling 65mph around 2k in 4th/od gear with is about a .63 gear ratio, without the final. This is with te gearvender disengaged.

With the gearvendor engaged, you split the SAME gear and end up aroud and est. 1300-1500rpm, still doing 65mph. Just like a regulr 3rd to 4t/od gear change.

Now, im not sure if they have tried to implement one in an H2 and it is costly, around 2k, but you not only get an improvement in gas mileage, but you theoretically end up with 8 foward gears instead of the usual 4 gears.

[johndjmix1]

I too found that keeping it at 60 on the highway will get you 13-15 mpg.....but its dam annoying to go that slow...and...

Figure out how much you save on gas by those 2-3 mpgs. A few bucks....not even worth it. Ill pay the extra $5 at the pump to be able to drive normal.

--John

[Captain of the Titanic]

I look at the average MPG. and for me, well,,, thats good enough. See we all have to buy gas and everyone that buys a hummer or knows about hummer knows that hummer is not the best in gas so we accept it when we buy and accept it when we go to the pump. I am pleased to see that I AVERAGE 16 mpg and I dont have to prove it to nobody.

What KONG isn't telling you is, that he TOWED his Hummer cross-country and is using that in the calculations of his AVERAGE mpg....:lame:

I can believe 16 on the highway with a reprogramming... But AVERAGE city/highway at 16? Noway... Are you sure that your Hummer doesn't have a 3 next to the H instead of a 2????

:twak:

I am about to reprogram, add the K&N aircharger and put headers and dual exhaust on, so we'll see how it effects my mpg... In my Tahoe it upped the mpg by 40% (from 10 mpg to 14mpg highway and yes, it was highly modified). I'm hoping for at least averaging 14 instead of 10.6 (as per the dash).

Also, I don't see how the average MPG is wrong on the dash.... It record miles driven and gallons used... It's pretty easy to figure at that point...