Gas Milage Tips And Mods?

[Lext]

Anyone have any ood Tips or Mods?
I Have a 03 h2, I am Averaging about 11.6, which is not bad. Is there anything that anyone has done that actually increases that number? Again, I Knwew what i was getting into, ( I also have a V8 Cj5 and a Lexus Lx 470).
Would a Supercharger help? Which Chip is the best? What about Cold air Intake?

[bigolH2]

Ive also got an 03 and its on 38's. I put a volant intake system on it and it increased a whoppin 1mpg. The performance programmer is on the way and its supposed to help a little too so Ill let you know how that works on my truck when im done installing it. My total right now is 9.9 so youre doin a little better than me!

[rocketw19]

i have a corsa exaust and a magnuson super charger and i went from 10.7 to 9.4 mpg avg. i think it droped cuzz i step into it a lil more now not crazy but a lil bit.

[Lext]

Thanks Guys,
So Which Mod If Any has anyone added that helped? The Hypertech Programmer Claims Better Fuel economy. anyone try that?


Has anyone done anything that actually raised the average?

[MONSTERMATT]

i think your gonna hard pressed to find anything that will "noticeably" increase mpg , but if u do, let us know, i have the hypertech programmed for 37x13.50 tires and i havent had any luck with gas mileage from i think using criuse control might help on the highway thou

[Lext]

Thanks Matt,
I Was Just trying to figure out if there was anything worth trying.
I LOVE the Vehicle, I Bought it to use as a Rolling Billboard for my florida Condo Rentals Business. I Am an Avid Offroader as well.

Anyone try E85? Is the Hummer E85 compatible?

[johndjmix1]

A lot of it is really all in the way you drive. If I set the cruize at 62mph I will get 15 mpg in my H2 on the highway.

Take it EXTREMELY easy of stoplights (I.E. Let everyone fly ahead of you) and leave plenty of room in front of you at all times so you dont need to use the brake. I do this a lot in stop and go traffic, its amazing how many times people hit the brake in stop and go....if you just leave a little room you will probly hit the brake once for every 50 times everyone else does.

Do all of this for a day and check your milage. You will be amazed. Remember GO EXTREMELY easy off stops, and never push the gas more than 1/4 of the way.

Granted I hate driving like that, but it does save TONS of $ on fillups. Think of it this way...u cruize slow and the cute girls have more time to check you out =)


--John

www.JohnHasMoreFun.com (http://www.JohnHasMoreFun.com)

[KenP]

Frankly, if you're worrying about the fuel consumption, then you should have bought something else.

[HummBob]

Originally posted by KenP:
Frankly, if you're worrying about the fuel consumption, then you should have bought something else.

x2

[MONSTERMATT]

yeah , seriously hummer was not meant to have good gas mileage if i was worried i would have got a hybird or whatever the fukk they are called but the above ideas will save a little like the cruise control idea

[Lext]

Now, See, i New I would get that!

The First Thing I Said Was, I Knew What I Was Getting into. The Hummer is actually the best vehicle I own on Gas Mileage ( The LX470 Actually gets about 2 miles bettwr But Requires Super. The Jeep ( CJ5 with a 360 V8 Gets about 8 because of the gearing and 35's).

[tomp]

Here is what I did....

I previously owned an 8.1 litre Chevy 2500HD. The gas milage was so bad, I bought an H2 and now I get better mileage.

Moral of the story, buy something else if you are worried about gas mileagehttp://www.elcova.com/infopop/emoticons/icon_wink.gif

[Dug]

Frankly, the guy doesnt give a **** about fuel mileage. Did you see his list of rides? But it doesnt hurt to ask for help about more mileage anymore than some of you donks that need help with more lift or more power.

[sbmike]

x2 what tomp said. I had the 2500 Avalanche and am getting much better mileage with the H2. On the other hand, I'm also getting older and racing from traffic light to traffic light has lost much of the appeal it once had so I've been doing what Johndjmix1 has been doing. My overall average gas consumption since buying the truck almost 3 years ago is 12.3 mpg city/highway and miraculously I'm still making it from here to there. http://www.elcova.com/infopop/emoticons/icon_wink.gif

[tomp]

Something to consider:

Bottled water cost more than gas and which do you think is easier to obtain?

Bottled water averages about $1 for a small bottle and that equates to about $8 per gallon. Go figure...

[rocketw19]

Originally posted by tomp:
Something to consider:

Bottled water cost more than gas and which do you think is easier to obtain?

Bottled water averages about $1 for a small bottle and that equates to about $8 per gallon. Go figure... haha thats funny coca cola sells water for more than coke and the water is the same they put in coke.

[johndjmix1]

Im hooked on that FIJI water its like $2 for a bottle at 7/11.

--John

[Lext]

O.K., Thanks Dug..
I Know where these guys are coming from, Thats Cool.

Now , Im Not Sure how we got to coca cola. Let me Refraise the question:

Did anyone Notice a Fuel economy Differance with the following Upgrades-
( As I Said, I am Already Getting 11.6 ( Pretty Happy With That).

Cold Air Kit -
SuperCharger-
Cat Back system-
Programmer/Chip?

I Am Considering these and the hummer dealer ( Whom I Do not Trust, Since they where closed down a few months back because the owner got caught dealing cocaine), Is claiming better performance ( Duh! ) and BETTER FUEL economy.

I Don't Mind Dropping the cash, I Just don't want to End up getting 7 miles per gallon because, we drive this vehicle all over the country.

If Someone could give me an honest opinion without desending into the realm of bottled water and coke, that would be great..

-Lex

[sbmike]

Lext: One of the things you will find out very quickly in this forum is that discussions morph very quickly from their original topic. It's something you will need to get used to if you want to keep your sanity http://www.elcova.com/infopop/emoticons/icon_wink.gif. To your immediate question indirectly, I have not spent any money on the mods you mention because after reading the archives of this forum I was not able to find anyone who could conclusively quantify any gain in fuel economy. I thought about purchasing a catback exhaust system which purportedly improves fuel economy but I wanted it more for the noise. I finally decided I like the quiet rumble the vehicle already makes and left it alone. Don't know if that helps any but there it is... no morphs either http://www.elcova.com/infopop/emoticons/icon_biggrin.gif.

[bigolH2]

My Volant intake increased my MPGs by a whoppin 1.5 mpg! lol. but hey, if you add those 1.5's up, thats quite a few more miles you can rock the truck down the street!

[Screeper]

Originally posted by sbmike:
Lext: One of the things you will find out very quickly in this forum is that discussions morph very quickly from their original topic. It's something you will need to get used to if you want to keep your sanity http://www.elcova.com/infopop/emoticons/icon_wink.gif. To your immediate question indirectly, I have not spent any money on the mods you mention because after reading the archives of this forum I was not able to find anyone who could conclusively quantify any gain in fuel economy. I thought about purchasing a catback exhaust system which purportedly improves fuel economy but I wanted it more for the noise. I finally decided I like the quiet rumble the vehicle already makes and left it alone. Don't know if that helps any but there it is... no morphs either http://www.elcova.com/infopop/emoticons/icon_biggrin.gif.

I also have tried the intakes and exhaust only to return most of it back to stock with the exception of the airaid air filter, and a programmer. (11.6 mpg) Also think about how long it would take to make up the 700 to 1000 dollars in cost if they did work. You might save five bucks a tank. 100 to 200 tanks later you might break even. If you want a small performance gain do it. If you want the gas savings, not worth it at all. The only big performance gain = supercharger IMO http://www.elcova.com/infopop/emoticons/icon_wink.gif http://www.elcova.com/infopop/emoticons/icon_smile.gif

[Lext]

THANKS GUYS!
Thats Awesome Feedback.

Hey I Notice a Lot of You are in South Florida. I Live in N.C. now but grew up in Fort Laud. (Coral Ridge).

I Used to Take an Old IH Scout out to what is now the area around Broward mall and Four wheel all the time when i was in High School ( At Nova, in the late 70's).

That Stuff is all Gone now though I Bet!

I Love this vehicle. I have only had it 2 weeks but I can't wipe the smile off my Face!

[KenP]

Originally posted by Lext:
THANKS GUYS!
Thats Awesome Feedback.

Hey I Notice a Lot of You are in South Florida. I Live in N.C. now but grew up in Fort Laud. (Coral Ridge). Hey, where are you down there?

[Lext]

Charlotte -
Hey One More Q:

I Need to Get the 30,000 Mile Service Done -
Hummer Dealer wants 600.00 The Chevy Dealer Says thats crazy, and Say's they will do everything for 200.00.

Is there anything that only a hummer Dealer would be able to do that I am Not Aware of??

[KenP]

Not that I'm aware of.

If you're on the left, you should smile. If you're on the right, stop looking at the front row tits. http://www.elcova.com/infopop/emoticons/icon_wink.gif

[Lext]

Im on The Left ( That Was Pre Hummer!) Les Paul is on the right, Thats exactly what he is looking at. Not bad for 90!
:>

[Dewi2005]

Hey Lext,

I think Screeper and SBMike summed it up just fine. I added:
0-Corsa exhaust = decrease in MPG.
0-Headers = no change in MPG
0-Air raid intake = no change in MPG
0-Hypertech programmer = small improvement in MPG
0-Intake spacer = small improvement in MPG
0-Supercharger = HUGE increase in power and fun, but decrease in MPG.. (Worth the change in my opinion) http://www.elcova.com/infopop/emoticons/icon_smile.gif

Enjoy your H2... they are AWESOME, and get used to being flipped off by granola eating, tofu farting ferries!! http://www.elcova.com/infopop/emoticons/icon_biggrin.gif

[Lext]

Thanks Guys, I Am Just Going to Pass on the upgrades. It Doesn't seem like there is enough of a Benefit ( If at All). I Am Happy with the performance. i have a Teenage son so Somehow I feel like i Might regret the Supercharger! :>

[Lext]

Enjoy your H2... they are AWESOME, and get used to being flipped off by granola eating, tofu farting ferries!!

Thats So Funny, It Happened to me today ( Other car was a Dodge Neon! ), Thats Gotta be fun to drive..

[KenP]

Originally posted by Lext:
Thanks Guys, I Am Just Going to Pass on the upgrades. It Doesn't seem like there is enough of a Benefit ( If at All). I Am Happy with the performance. i have a Teenage son so Somehow I feel like i Might regret the Supercharger! :> Smart man. Very smart man.

So, coming to Moab?

[Lext]

Wish I Could, i am Tied Up Till Widows O.S. (VISTA) Ships.

i Watched the lionsback H2 Video Someone posted. Thats Freakin Awesome. I Love my Hummer!

[boo4u]

Magnacharger, Extreme Flow CatBack exhaust = 10 mpg. Supercharger is worth every penny and future ones as well with the fun factor!

[31_bandits]

My Volant intake increased my MPGs by a whoppin 1.5 mpg! lol. but hey, if you add those 1.5's up, thats quite a few more miles you can rock the truck down the street!

Was that 1.5 mpg averaged over a few tanks, so as to make a pretty solid estimate?

[NEOCON1]

up your highway pressures 5 psi , this is the best way to increase your mileage , next to pushing it

[31_bandits]

Anyone have any ood Tips or Mods?
I Have a 03 h2, I am Averaging about 11.6, which is not bad. Is there anything that anyone has done that actually increases that number? Again, I Knwew what i was getting into, ( I also have a V8 Cj5 and a Lexus Lx 470).
Would a Supercharger help? Which Chip is the best? What about Cold air Intake?

Hey Lext,

i have the same curiosity - how to improve mileage if possible.

I'm very surprised by how GOOD the mileage on my H2 has been. The dealer suggested that getting <10 around town shouldn't be a surprise, and even suggested that <10 on the highway in adverse (75, into wind, whatever they said) might happen.

But as of today, my vehicle has used 255.7 gallons of gas over 3292 miles, or an avg. of 12.9. When i got it, it had 50 or 60 miles and an average of 3 or 4 (i can't exactly remember, although i think i wrote it down somewhere), so in the time i've driven it its averaged about 13.5.

The first tank was 11.5, the 2nd most recent tank was 14.5, and today i put on 400 miles on the highway - first into the wind, then turn around with the wind for a round-trip, and got 14.6 with an avg speed of 65-70. 12.5 into and almost 17 with the wind.

:confused: It doesn't seem to me that i drive anything but normal. And there are 2 off-roading sessions on that, during which i probably got 4 mpg

Some things that i have noticed are that mileage drops off fairly quickly as speeds go above 55 on the highway. you might pay 1mpg for 5 more MPH. I don't idle alot as part of my normal living, so that helps & i've always been fond of coasting to stops if i can rather than using the brakes. But its not like i'm driving like a hybrid dude & causing 10 car pile ups by merging onto the freeway at 40 in an ongoing attempt to approach the EPA ratings.

beats the crap out of me. but my mileage isn't really any worse than any full size pickup or large SUV. :confused:

The closest thing there is here to a hummer "tuner" shop touted some Airraid intakes and whatever exhausts as adding 2-3mpg, but that guys H2 reads 8.7. I know he tows things with it alot (no towing for me) & it idles around in their lot often, and they have alot of performance parts & generally drive like raped apes, but i can't figure how they think they get 2-3 mpg more. they were getting 6 before?

So i might try an intake or whatever... but only if somebody agrees to take it back if it mucks things up.

[31_bandits]

anyway, my truck will have a 14mpg avg after a few more tanks.

-i run premium fuel (is about 10-20 cents more here)
-mileage has gone up with each tank except the offroad ones
-my last 2 tanks were the best, and i removed the NERF steps and the roof cross bars. those cut down on wind noise at highway speeds, so maybe if they were noticably contributing to noise they were noticably worsening aerodynamics
-i have 17" aftermarket rims and factory tires and have never adjusted tire pressure (i'm learning)
-no lifts/lowerings/engine mods

whatever that's worth

[Dewi2005]

Frankly, if you're worrying about the fuel consumption, then you should have bought something else.

Who's Frank??? :D

[menuserve.com]

what do most people keep their tire pressure at?

[GeorgeSSSS]

A lot of it is really all in the way you drive. If I set the cruize at 62mph I will get 15 mpg in my H2 on the highway.

Take it EXTREMELY easy of stoplights (I.E. Let everyone fly ahead of you) and leave plenty of room in front of you at all times so you dont need to use the brake. I do this a lot in stop and go traffic, its amazing how many times people hit the brake in stop and go....if you just leave a little room you will probly hit the brake once for every 50 times everyone else does.

Do all of this for a day and check your milage. You will be amazed. Remember GO EXTREMELY easy off stops, and never push the gas more than 1/4 of the way.

Granted I hate driving like that, but it does save TONS of $ on fillups. Think of it this way...u cruize slow and the cute girls have more time to check you out =)


--John

www.JohnHasMoreFun.com (http://www.JohnHasMoreFun.com)
I've tried John's suggestions and they work. Here's a few more:

The H2 is heavy. When you are going down a hill or slight grade, take your foot off the gas. You'll be surprised how well the truck maintains its speed.

Correct tire pressure is 37 PSI. Most gas stations, etc., will inflate the tires to 32 or 33 without thinking. Make sure they are inflated to 37 psi when they are cold.

Use the cruise control whenever possible and safe. Especially on a freeway, it gets good milage.

All of this gets natural after a while and you don't notice it.

Best regards,

George SSSS

[Chuck-H2]

I have a H-2 2005 LUX with 2400 miles so far, city driving, and after this 1st oil change I went with Mobil-1 and went from 9.9 to 10.1 on the dash meter for fuel consumtion, so this might help.?
I dont know how reliable the dash meter is but it seemed to help?
anyone else done this and did it make a difference?. I havent done anything else to the truck.

[H2 Ranger]

True that having synthetic oils in Eng, Xsmn, Diff etc. may help but the additional costs may not justify using it. Synthetic oils have been know to cause marginal seals to leak. If you worry about MPG I have to agree with Kenp

if you're worrying about the fuel consumption, then you should have bought something else.x3:)

[31_bandits]

while its true that anybody who is going to be paranoid about mileage, yet bought a hummer, is fit for the looney bin...

the same could be said about anybody who wanted to go really fast, yet bought a hummer. so the same basic logic could be applied to superchargers and all of those.

nothing wrong with wanting better mileage or better 0-60 times, perhaps?

I noticed last night on my way by a road-side radar sign that my speedo said ~40, but the radar sign said 38. Now i realize this isn't proof-positive that my speedo is off, but...

if my speedo read high, perhaps my # of miles would run up too quickly, and the mileage reported by the 'puter would be skewed upward?

similarly, if some of you are running larger tire, perhaps your speedo reads low & your mileage gets reported as worse than it is?

is there something right or wrong with that thinking? I should calibrate it with mile markers & a roadside gas pump, perhaps.

[31_bandits]

i did "calibrate" the computer once with actual gallons used and the odometer reading.

That was spot-on. But if the odometer isn't right, then p'raps the mileage report isn't right either...


And on a side note, i think its funny as crap getting 15mpg. i know its still bad mileage, but it completely confuses people who ask about my mileage in an accusatory fashion.

"what do you get with the hummer"

"about 15 avg for highway/town"

"with what pulling it?"

"i think its a six liter V8"

"show me"

"ok"

"you reset that just a while ago and coasted in here to fill"


i had that convo, word for word, with some dude at the gas station a few weeks back. You see, enviro's WANT H2s to get 8. It wouldn't make them happier if we all got 20, it would make them mad. I swear that's true, or i guess at least. They'd be mad about all H2s averaging 20. Not happy because less gas was being used, less CO2 created, but mad because this vigilante cause, so slathered in self-righteousness, would be somewhat undone. They wouldn't be as much "better" as they thought they were.

And that, folks, just might be lame.

[Aubs]

i did "calibrate" the computer once with actual gallons used and the odometer reading.

That was spot-on. But if the odometer isn't right, then p'raps the mileage report isn't right either...


And on a side note, i think its funny as crap getting 15mpg. i know its still bad mileage, but it completely confuses people who ask about my mileage in an accusatory fashion.

"what do you get with the hummer"

"about 15 avg for highway/town"

"with what pulling it?"

"i think its a six liter V8"

"show me"

"ok"

"you reset that just a while ago and coasted in here to fill"


i had that convo, word for word, with some dude at the gas station a few weeks back. You see, enviro's WANT H2s to get 8. It wouldn't make them happier if we all got 20, it would make them mad. I swear that's true, or i guess at least. They'd be mad about all H2s averaging 20. Not happy because less gas was being used, less CO2 created, but mad because this vigilante cause, so slathered in self-righteousness, would be somewhat undone. They wouldn't be as much "better" as they thought they were.

And that, folks, just might be lame.

I agree that most hippies, and people(morons) in general, refuse to believe, or don't want to believe that the H2 is capable of getting 15MPG. I say they think this because:
1. Their SU-BA-RU only gets 18MPG.
2. HUMMERS must be evil, because they're so cool.
3. Their minivan gets an awesome 19MPG
4. They believe GM is the worst automaker on the planet, and the General could never build any vehicle capable of high MPG or quality.:D

Personally, THEY DON'T KNOW WHAT THEY'RE MISSING!!! :D:D

I have noticed on every car I've owned (LC, BMW X5 and X3, H2) that the speedo always displays a higher speed than the radar thingys. I think it's to give you a buffer, that's built in to the car, against speeding. So you really think you're going 10 over when it's actually 7-8.

I agree that I'd like to get the best mileage I can. I see no reason why I shouldn't try for that. Lately, and this is really bugging me, the trip miles vs. gallons used is calculating something like 17MPG. The overall average is about 15 MPG according to the computer. I am going to find out today what the actual mileage is by dividing my next tank by the miles. But I do go easy on stoplight pullouts, try to time braking to avoid sitting at redlights, and keep the throttle low climbing the passes.

Actually, my theory is that those activities combine with decreased air pressure at high altitude (about 9,000 feet) cause the gas molecules injected into the engine to disperse more readily, therefore creating more complete combustion of the fuel and causing an increase in fuel economy. However, there is less O2 at this elevation, which may negate any such effects. Perhaps my H2 is just wonderfully fuel efficient.

Or maybe the trip computer is lying to me...:eek: ;) I bet Onstar reprogrammed it to make me think that I'm getting better mileage.

I do notice that my tank seems to fluctuate wildly (I'm talking 1/4 tanks disappear in minutes) sometimes with it returning to previous levels.

[Big Z]

I have absolutly NO issues with Fuel Mileage! Matter of Fact, drove to and around Reno for 4 days (approx. 1000 miles) and only filled the tank once--when i got back. ;)

I know I'll be losing another MPG shortly after installing the GOBI!

[31_bandits]

I agree that most hippies, and people(morons) in general, refuse to believe, or don't want to believe that the H2 is capable of getting 15MPG. I say they think this because:
1. Their SU-BA-RU only gets 18MPG.
2. HUMMERS must be evil, because they're so cool.
3. Their minivan gets an awesome 19MPG
4. They believe GM is the worst automaker on the planet, and the General could never build any vehicle capable of high MPG or quality.:D

Personally, THEY DON'T KNOW WHAT THEY'RE MISSING!!! :D:D

I have noticed on every car I've owned (LC, BMW X5 and X3, H2) that the speedo always displays a higher speed than the radar thingys. I think it's to give you a buffer, that's built in to the car, against speeding. So you really think you're going 10 over when it's actually 7-8.

I agree that I'd like to get the best mileage I can. I see no reason why I shouldn't try for that. Lately, and this is really bugging me, the trip miles vs. gallons used is calculating something like 17MPG. The overall average is about 15 MPG according to the computer. I am going to find out today what the actual mileage is by dividing my next tank by the miles. But I do go easy on stoplight pullouts, try to time braking to avoid sitting at redlights, and keep the throttle low climbing the passes.

Actually, my theory is that those activities combine with decreased air pressure at high altitude (about 9,000 feet) cause the gas molecules injected into the engine to disperse more readily, therefore creating more complete combustion of the fuel and causing an increase in fuel economy. However, there is less O2 at this elevation, which may negate any such effects. Perhaps my H2 is just wonderfully fuel efficient.

Or maybe the trip computer is lying to me...:eek: ;) I bet Onstar reprogrammed it to make me think that I'm getting better mileage.

I do notice that my tank seems to fluctuate wildly (I'm talking 1/4 tanks disappear in minutes) sometimes with it returning to previous levels.

http://www.landroverforums.com/m_12175/tm.htm

interestingly, that's about exactly what you hypothesized earlier.

[GLBLWARMR]

I just drive downhill boths ways to wherever I am going.

[Lext]

Wow....
I Started this Post in March!
I am Floored that it is still alive!

Lext

[johndjmix1]

I did a test with my Ford Expedition over the summer, don't think I mentioned it to you guys. Normally my expo gets about the same milage as mt H2.

Removed roof rack bars.
Clean, new air filter.
Overinflate tires 8psi over max recomended PSI.
Fold in mirrors on highway (The expedition has HUDGE mirrors).
Set cruize at 60mph.


Went from H2 range (11-13 highway) to 17.5-19 mpg highway.

When it comes to cars Im hooked on my Fiance's saab 9-5. Full size 4 door car. 4 cyl turbocharged gas motor. 3,500 towing capasity. 31 mpg driving it normally....agressivly when im driving it still gets 30. The thing its pretty quick once the turbo spools up. Problem is she gets mad when I drive it. lol.

--John

[fisherman]

Well all of you are smarter than me. I got 12.1 miles to the gallon for 6000 miles. Last October I purchased the Fuel Maxx Vortex Generator on Ebay for 12 or 15 bucks. I started noticing an increase immediately and showed everyone in the office the reading on my dash. It read 13.7. I have only seen it go down once and that was the trip to Jackson Hole, Wyoming last Xmas. It was as low as 11.8 in the high mountains but coming back gradually incresed to 13.9. I'm driving back to Elkhart, IN. tomorrow and see Stuart at OEMDASH. Got to install Black Rims and one more piece of carbon fiber for the sun roof controls. I will get 13.7 or better on the interstate guarantee. If I couldn't afford the gas, I wouldn't have bought a Hummer but 10 % helps for the hotel bill. I do remember my 1974 "454" corvette getting 5.5 mpg.
The "fisherman"

[mikejr]

i have a bit over 12K miles on mine. Most of my driving is stop and start and i commute a whopping 3/4 of a mile to my office in it. The dash says 11.7 MPG. Last long trip we took if i recall right, we got a bit over 13 MPG i think. But we were driving between 75 and 85 on the interstates.

I think others have said this before....its a Hummer...its heavy...its shaped like a brick...it never was designed for gas mileage. If you can afford to buy the truck...you can afford to buy the fuel.

When we were at the Pittsburgh International Car show last weekend we were looking at the mileage estimates for the various vehicles. You would be surprised that a large number of vehicles only get around 15 MPG around town....not much bettter than the H2 and sure as hell nowhere near as cool as the H2.....well....all but the rolls royce they had there for $330K it only got 12 MPG around town....damn gorgeous car!

[johndjmix1]

Really it depends on the area. Driving a H2 in somewhere like Long Island, NY is MUCH MUCH different from driving it in Colorado. In Long Island it never has a problem pulling 75-80 on the highway, in colorado its downshifting and fighting. In long island you get MUCH hight MPG than Colorado.

Altitude, mountains, hills, and winds (thats a big factor) really affect power and MPG.

My 05 F350 Diesel could only hit 75mph TOPED OUT (thats pedal to the floor) in Nebraska towing a 2 place enclosed snowmobile trailer....just because of the wind!

--John

[Harley_Daze]

interesting reading of everyones take on mpg,..the first thing that comes to my mind on fuel consumption is axle ratio,..has anyone went to a higher axle ratio?..seems the 6.0 engine should propel the Hummer adequately with a 3.73 or a 3.54..comments?..

[lennyrebel]

I just drive downhill boths ways to wherever I am going.
Personally I always keep the wind behind me --I find that a big plus and keep the air suspension raised in back so I"m also always going downhill. It's all good, Regards The Rebel. Sometimes the old timers have to show the kids how its done.:beerchug:

[MVR 155]

interesting reading of everyones take on mpg,..the first thing that comes to my mind on fuel consumption is axle ratio,..has anyone went to a higher axle ratio?..seems the 6.0 engine should propel the Hummer adequately with a 3.73 or a 3.54..comments?..

A taller gear (lower numeric) axle ratio would most likely cause mileage to suffer around town and possibly pick up a bit on the highway, towing mileage would suffer the worst, a taller gear would make the vehicle work harder till it achieved a given speed. At highway speeds in windy conditions you may also get worse mileage.

Great exaple of this is we just traded a 05 Eddie Bauer explorer in for the H2 last week, it was a V6 with 3.55 gears, got 15ish around town and 18-19 on the highway if you kept it under 75, towing a trailer netted us down in the 12-13mpg range and if you broke 80mph count on it going down in the low 17's high 16's....... My father owned basically the same truck with 4.10's and it got way better mileage than ours with the 3.55's around town and on the road, he even got better mileage towing a 8x13 enclosed motorcycle trailer than I did towing a 2 place jet ski trailer with ours. Point is once you reach a certain point going to a taller gear can hurt your overall performance and economy.... this could also be true with going to low for gearing. I believe that the 4.10's in the H2 are right at home and most likely deliver the best overall performance and economy

[Captain of the Titanic]

Dear Mr. Bandit....

Sure I believe you're getting 15 MPG. After all, we all do.

Sure I believe your wife weighs 105 with 38DD tits. After all, all our wives do.

Sure we believe that you pecker's 12 inches. After all, all of ours are.

Sure Santa comes at Christmas. He always has...

15 MPG? BULL****. A H2 doesn't average 15 MPG unless you tow it 1/3 of the way...

Damn... Be realistic. If you said 12, I'd of said BRAVO! You are really working it. But 15? Nope. Not unless your city driving is going 55 with no lights...

:lame: :lame: :lame:

[IRA51]

I GET 11 MPG and the way i drive a'm lucky to get that .these H2's are gas hogs and every last person who owns one knew it B4 they bought it. if you have a sharp tune and a fresh air filter you may get 12 to 15 is you drive like a little old ladey .ther is no magic secret trick or device to make a 6400 lb 6.0 V8 all wheel drive truck that is shaped like a brick get 17 mpg now, maybe in the future but not now so just grab your balls and wallet fill up twice a week and stop obsessing about it and enjoy the ride .:rant:

[HUM GOOD]

^^^^^what he said:violin:

[tower]

Something to consider:

Bottled water cost more than gas and which do you think is easier to obtain?

Bottled water averages about $1 for a small bottle and that equates to about $8 per gallon. Go figure...
I've been getting 37 mpg by running on bottled water.:beerchug: Then my H2 learned that Aquafina was really tap water and now it won't run at all (go figure :confused:).

Seriously, this is an issue I have discussed at length many times with Mike Sabarrese (Cerritos Hummer Service Manager and H1 Racer for Hummer). He keeps returning to the notion that the engineers at Hummer or GM already designed and tuned your beast to get the best posssible mileage you can. You can spend a fortune on upgrades which claim improvement, but the only 3 things that will really help are driving like a little old lady or converting to the Duramax Diesel engine (ca. $40,000) or leaving her parked. So enjoy your Hummer, just the way she is.:iagree::dancingbanana: