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08-17-2006, 06:45 AM
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Hummer Professional
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Join Date: Feb 2006
Posts: 368
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Milage in Colorado
Im begining to think somthing is up with my H2. No matter how gentle i drive i cant get the MPG over 11. And trust me, i know how to drive gentle and get good mpg, i got my ford expedition up to 17 in NY...
The real thing that makes me wonder is, if i drive normal i get barley any improvement in MPG. Also, the engine is very loud (sounds like the clutch fan?) when accellerating, espically with the A/C on. Power also seems low. Worst on hot days.
Is this normal? I want input from colorado people since i know out here mpg is way down from what we would get out east.
I know when i got my H2 it was doing much better. And yea, i checked the air filter....its clean.
Any ideas guys?
--John
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2006 Hummer H2 Lux Series
www.JohnHasMoreFun.com
1/4 Mile 15.29@91.34mph
Mods:
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Warn 9.5 Winch
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08-17-2006, 06:50 AM
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Hummer Messiah
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Join Date: Feb 2003
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Re: Milage in Colorado
My life-to-date mileage is exactly 12 mpg. In this thin air, the H2 is a bit underpowered. Any time you go up a slight incline it shifts down into 3rd, and often 2nd which winds the engine like crazy. I drive up I-70 to Evergreen almost every day and spend 1/2 of that time in 2nd gear at 4500 rpm. I've added a rack, winch, and 200 lbs of underbody protection. The more weight you put on it, the worse it gets. Adam's loaded rig probably hasn't seen 3rd gear in 12 months!
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08-17-2006, 07:40 AM
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Hummer Authority
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Re: Milage in Colorado
Are you running your A/C all or most of the time? That sound you are reffering to is your fan clutch, it comes on to bring down the engine temps, and will come on quite a bit more when the A/C is on. When the A/C and or fan clutch is on it will suck down a decent amount of power. Enough to make a noticable difference, and will knock your MPG too.
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08-17-2006, 03:08 PM
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Hummer Guru
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Join Date: Dec 2002
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Re: Milage in Colorado
I get 32mpg.
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08-17-2006, 03:45 PM
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Hummer Expert
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Join Date: Oct 2005
Location: Lebanon, PA
Posts: 723
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Re: Milage in Colorado
Actually, I found with my stock H2, running Breckenridge area, I got around 15 MPG no matter what. Here on the East coast, I have to be light on the pedal to get 12MPG. So I experienced a milage increase out there.
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08-17-2006, 04:05 PM
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Hummer Messiah
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Re: Milage in Colorado
Quote:
Originally Posted by Aubs
Actually, I found with my stock H2, running Breckenridge area, I got around 15 MPG no matter what. Here on the East coast, I have to be light on the pedal to get 12MPG. So I experienced a milage increase out there.
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08-17-2006, 04:19 PM
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Hummer Authority
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Join Date: Apr 2005
Location: Ouside MN's 5th Congressional District, MN
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Re: Milage in Colorado
Quote:
Originally Posted by Aubs
Actually, I found with my stock H2, running Breckenridge area, I got around 15 MPG no matter what. Here on the East coast, I have to be light on the pedal to get 12MPG. So I experienced a milage increase out there.
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Were you going down the ski slopes when you were getting 15mpg?
John, does the roaring fan stop roaring at just above 2000rpm? i.e. is the fan clutch releasing or not? You can tell more easily when parked. Slowly increase throttle in park and see when it stops. If it's really noisy and you can't tell, you might need to lift the hood, stand on the rocker and watch it as you press the throttle and watch the RPMs.
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'03 pewter base H2
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08-17-2006, 04:28 PM
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Hummer Messiah
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Join Date: Feb 2003
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Re: Milage in Colorado
Quote:
Originally Posted by ree
Were you going down the ski slopes when you were getting 15mpg?
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08-17-2006, 05:26 PM
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Re: Milage in Colorado
Hey, I'm not lying! I thought the DIC was being evil, so I even calcuated using miles travelled and how much I put in the tank when I filled up. Maybe you Coloradonians have too much lead in your feet! I tested this mileage again when I returned to Colorado a few weeks ago. Same thing happened. I have a magical H2!
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08-17-2006, 05:30 PM
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Hummer Professional
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Join Date: Jul 2005
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Re: Milage in Colorado
11.8 mpg on mine with 35" Nitto Muds and 20" wheels.
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08-17-2006, 05:36 PM
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Hummer Authority
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Re: Milage in Colorado
Quote:
Originally Posted by Humdingah
11.8 mpg on mine with 35" Nitto Muds and 20" wheels.
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Is this the miledage you get in CO or somewhere else?
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'03 pewter base H2
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08-17-2006, 06:25 PM
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Hummer Professional
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Re: Milage in Colorado
Truck's never been anywhere but CO...Denver and surrounding area.
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08-17-2006, 06:26 PM
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Hummer Guru
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Join Date: Dec 2002
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Re: Milage in Colorado
I get 32mpg.
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08-17-2006, 08:25 PM
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Hummer Professional
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Join Date: Feb 2006
Posts: 368
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Re: Milage in Colorado
You know the fan doesnt seem to be releaseing at 2000 rpm...im going to go out now and check it out. Would definatly explain whats wrong, i have seen bad fun clutchs before, but usually they fail the other way and the vehicle overheats.
--John
__________________
2006 Hummer H2 Lux Series
www.JohnHasMoreFun.com
1/4 Mile 15.29@91.34mph
Mods:
Magnusun Radix Supercharger!!!
Switch to allow full Nav Controls while moving
Warn 9.5 Winch
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08-17-2006, 08:27 PM
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Hummer Guru
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Join Date: Dec 2002
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Re: Milage in Colorado
I get 33mpg.
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08-17-2006, 10:13 PM
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Re: Milage in Colorado
I get 14-15mpg in Silicon Valley (21,000+ miles over the last 13 months), but I'm driving an H3.
S.
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08-18-2006, 01:19 AM
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Hummer Veteran
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Join Date: Jun 2006
Location: Anyplace Colorado
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Re: Milage in Colorado
13 to 14 mph here.. in Colorado. I mostly drive to and from work.. and I drive slow (let the beast work its way up to speed). This was with the DIC saying 14-15mph.. actual calculated 13 to 14. Then again.. I don't have any major hills in my path.. pretty straightaway and try to time the lights.
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08-18-2006, 01:20 AM
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Hummer Guru
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Re: Milage in Colorado
I get 55+ and I am sticking to it
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08-18-2006, 02:08 PM
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Hummer Veteran
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Join Date: Jul 2006
Location: Alabama
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Re: Milage in Colorado
So the fan is that roar you hear as you pull away from a stop that is loud enough to drown out the exhaust and everything? I didnt know wtf that was.
During the day and when I first pull out of the driveway I hear it. Sometimes I can pull away slowly and hear the exhaust burbling, but when this fan goes on you cant hear anything but it and the truck feels weak.
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08-18-2006, 02:37 PM
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Hummer Authority
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Re: Milage in Colorado
Quote:
Originally Posted by H2 GTS
So the fan is that roar you hear as you pull away from a stop that is loud enough to drown out the exhaust and everything? I didnt know wtf that was.
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Yes. It probably should drown out everything, but it is pretty loud.
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'03 pewter base H2
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