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Hummer Gas Mileage

41 messages,  Last post on Feb 05, 2009 at 11:19 AM

You are in the Hummer Forum. Your Hosts are steve_ & tidester

What is this discussion about? HUMMER H1, HUMMER H2, Fuel Efficiency (MPG), SUV


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#8 of 41
Re: Hummer Gas Mileage [vla1523] by mac24
Jun 18, 2007 (8:34 pm)
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Replying to: vla1523 (Jun 18, 2007 7:52 pm)

Hi,
It's very hard to diagnose specific noises, rattles and electrical problems over the internet. However, I can tell you that it's no more normal for an H1 to have bad rattles and shakes, a flashing dome light, or an illuminated CEL than it is for any other vehicle.
 
I'll hazard a guess that there's a bad electrical connection causing the dome light to flicker. The shaking is most likely caused by improperly balanced wheels. Mine is completely smooth at all speeds, but it wasn't until I took care of the balancing that it became that way. As for the CEL, you need to have it checked for codes, just like any other modern OBDII equipped car. You can have it done free at Autozone.
 
As for mpg (don't forget it's diesel), I'll get 12-13mpg driving briskly in town, easily keeping up with traffic but anticipating stop lights so that I keep rolling wherever possible, and maxing out at 65-70mph. However, I've recently been doing several thousand miles of 100 mile round trips, 1/3 town 2/3 highway. By driving as I normally do, but restricting my highway speed to 55mph I consistently get 14.5 mpg. As well as saving fuel, it's quieter at 55, and more relaxing too. Downside is slightly longer journey times.
 
An H1 is not the cheapest or most practical vehicle (unless you live in the wilderness), but it really is FUN!!! It's hard to justify for any other reason than you just want one, but that applies to many other vehicles from Corvettes to Jeeps.
 
If you have any specific questions I'll be happy to answer them if I can.
#9 of 41
Re: Hummer Gas Mileage [mac24] by vla1523
Jun 19, 2007 (11:56 am)
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Replying to: mac24 (Jun 18, 2007 8:34 pm)

Thank you very much for all your info. If another question comes up i'll ask you. Thanks again you have been very helpful!
#10 of 41
gas guzzler forever??? by detroitlions
Jun 24, 2007 (6:56 pm)
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Replying to: vla1523 (Jun 19, 2007 11:56 am)

we really love our hummer is there anything i can do as far as modifing/adding anthing to get better gas mileage. or does it just require a tune-up?
#11 of 41
Re: gas guzzler forever??? [detroitlions] by mac24
Jun 25, 2007 (5:14 am)
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Replying to: detroitlions (Jun 24, 2007 6:56 pm)

...anthing to get better gas mileage. or does it just require a tune-up?
 
Kind of hard to answer without knowing what your current gas mileage actually is.
 
Any reason this is posted in 'H2 Wheels and Tires'?
#12 of 41
Re: gas guzzler forever??? [mac24] by steve_ HOST
Jun 25, 2007 (7:14 am)
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Replying to: mac24 (Jun 25, 2007 5:14 am)

We've moved the post over to the generic Hummer mpg discussion.
#13 of 41
Re: gas guzzler forever??? [steve_] by mac24
Jun 25, 2007 (7:56 am)
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Replying to: steve_ (Jun 25, 2007 7:14 am)

It's like magic!
#14 of 41
Re: gas guzzler forever??? [mac24] by steve_ HOST
Jun 25, 2007 (8:21 am)
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Replying to: mac24 (Jun 25, 2007 7:56 am)

Magic would be increasing the mileage to 35 mpg.
#15 of 41
Re: gas guzzler forever??? [steve_] by tired_old_dave
Jul 09, 2007 (6:28 pm)
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Replying to: steve_ (Jun 25, 2007 8:21 am)

Steve, I really didn't want to post again on the main topic(and hog the discussion) and I didn't join digg to give you some hits. But the diesel keeps rearing its head and following is the ed wallace review of the new jeep v6 diesel.
http://www.myfoxdfw.com/myfox/pages/Home/Detail;jsessionid=4E0CB8EBBF43F9CD95577EFFF9D50F3A?contentId=3632590&version=2&locale=EN-US&layoutCode=VSTY&pageId=1.1.1&sflg=1
 
A recent test of of our '06 H3 auto w/adventure pkg with 13k miles on the odometer, 10% ethanol, a maintenace dose of red line fuel additive, 42psi in the 33's, no noticable wind, a/c running, 500lbs total passengers and cargo, and cruise at 68mph yielded 19.5 mpg. Off of cruise and not keeping up with the front runners and yet not bringing up the rear lowered mpg by 2.
#16 of 41
Re: Hummer Gas Mileage [mac24] by suncoastmike
Jul 11, 2007 (4:01 pm)
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Replying to: mac24 (Mar 08, 2007 7:26 pm)

I have an '05 H2 and I get 12 mpg. You are getting 8-10?
#17 of 41
Re: Hummer Gas Mileage [suncoastmike] by mac24
Jul 11, 2007 (4:09 pm)
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Replying to: suncoastmike (Jul 11, 2007 4:01 pm)

No, I have an H1 and I'm currently getting 14.5 mpg (diesel).
 
See post #6 for what I said about the H2.
Your 12mpg is pretty good. You might do a little better with a lighter right foot, and you'll do a lot worse towing or off-roading.

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