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08-14-2005, 11:13 AM
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Hummer Veteran
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Join Date: Jun 2005
Location: West Palm Beach, FL
Posts: 185
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2 tankfulls through mine.
1st 17.2mpg AC on 100% of the time, 70/30 Hgwy/City.
2nd 15.3mpg AC on 100% of the time, 50/50 Hgwy/City, towed 4000lb trailer for 55 miles.
Plenty of power for towing. I was really suprised! 
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\'06 H3: Slate Blue, Lux Cashmere, OffRoad, Auto, Sunroof, XM, Rails, Racks, and Guards.
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08-13-2005, 06:58 PM
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Hummer Veteran
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Join Date: Aug 2005
Location: Montana
Posts: 66
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Just filled up with my first tank since getting the H3 home. Had 250 miles on her--200 interstate, the balance two lane country road and thru town a bit. 17.9 MPG
Slate Blue, Lux, Adventure, Brush Guard
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Slate Blue, Lux, Off-Road Package, Grill Guard, Mudflaps all Around, Black Tubular Steps, HUMMER SS Inserts
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06-26-2005, 01:38 AM
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Join Date: May 2005
Location: Scottsdale, AZ
Posts: 455
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I just got the 33" tires on Thursday, and I filled up Friday. I will wait till this tank of gas is gone, then post some good figures. This tank will bring the mileage to roughly 1900 miles I imagine.
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06-20-2005, 06:37 PM
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Hummer Veteran
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Join Date: Jun 2005
Location: Katy, Texas
Posts: 84
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First tank of gas run through our H3 with 33's was about 13mpg. That was about 50/50 highway, city driving...pretty much all with the sunroof wide open and the A/C blowing.
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Traded 4-1-06: 2006 Black Hummer H3 Adventure Series - Vortec 3.5L Inline 5
Offroad Suspension Package, 33" Tires, Electronic Fully Locking Differential, 4.03:1 2-speed Transfer Case, Ebony Cloth Trim, Automatic Transmission, Sunroof, Roof Marker Lamps, Fog Lamps, XM Satellite Radio, CD/MP3 Player, Trailering Package, Black Tube Nerf Bars
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06-20-2005, 05:07 PM
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Join Date: May 2005
Location: Scottsdale, AZ
Posts: 455
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If we are going to get 12-13 mpg what is the point of the small H3?
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06-20-2005, 04:22 PM
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Join Date: Jun 2005
Location: maine
Posts: 46
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so are people out there with their h3's already getting the stated gas milage? interested to hear what you guys with the 33"s are getting. i hope its relatively the same
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06-26-2005, 02:25 PM
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Join Date: May 2005
Location: Scottsdale, AZ
Posts: 455
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Isn't 14 a far cry from what we thought it would be? If I could average 14 with the H3, and 12 with the SUT I'd take the SUT every time.
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08-13-2005, 07:06 PM
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Hummer Expert
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Join Date: Oct 2003
Location: My Happy place.
Posts: 543
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Cherokee with a 4.0L V6 Really where can I get one of those? The XJ nevevr had a 4.0 V6.
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Liven large in XM's sonic temple.
When all else fails, blame it on childhood issues.
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06-27-2005, 03:04 PM
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Join Date: Jun 2005
Location: maine
Posts: 46
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h3 buyer to be: he said he is expecting the 2(1slate 1 superior) this week those are his stock. i ordered mine a week and a half after that so my ship date isnt in yet. would have bought the stock one but no lux no 33"s and had the chrome and no brushguard the opposite of everything i wanted except the color.
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06-27-2005, 02:41 AM
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Join Date: May 2005
Location: Scottsdale, AZ
Posts: 455
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Mainer, what are they telling you for a chip date of the Blue?
Killian, don't tempt me... My wife is frantic, she thinks I am going to come home with an H2 this week (she is not too far off). Or should I say attempt to come home. The locks will be change, and my bedroom will not be her bedroom any more! LOL
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06-21-2005, 02:38 AM
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Join Date: May 2005
Posts: 65
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I am getting around 14 to 16 on the hiway. Thats with some rolling hills. I also pulled my 12 foot cargo trailer that is 6 ft tall inside, with about 2400 lbs total. It pulled it quite well, I was suprised. My speed was around 65 to 70 mph up and down small hills. I just shifted it in 3rd gear and left in 3rd the whole way up the hiway about 70 mile distance. It pulls nicely in 3rd gear, with about 2800 to 3200 rpms on the tacometer. I fill up at the bgining and the end, and I was getting around 10 to 11 mpg. I dont think thats to bad in 3rd grear the whole way.
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06-26-2005, 03:36 PM
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Hummer Guru
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Join Date: Apr 2005
Location: Orlando, FL
Posts: 6,358
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I have to agree. I am disappointed in the mileage I am hearing so far. Hopefully they will start doing better with some more miles. I get 15 with a 5.0 V8.
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I don't care about the "Jeep thing"  as long as my mail is on time!!!
Slate Blue H3 Adventure w/sunroof, Monsoon/NAV, DVD and marker lights
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06-20-2005, 06:17 PM
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Hummer Professional
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Join Date: May 2005
Location: Calexico, CA
Posts: 366
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Well, I think that with the H2 I'd be getting about 8 mpg (I'm pretty hard on the pedal), sooo, 13 mpg is pretty good for me. Besides, the H3 is very confortable and I can maneuver a lot better than with the H2.
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\'06 Boulder Gray H3 / Loaded
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06-20-2005, 06:29 PM
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Hummer Professional
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Join Date: May 2005
Location: Calexico, CA
Posts: 366
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by mstams:
My SUT averages 11.6 mpg in 50/50 city/highway driving. </div></BLOCKQUOTE>
Oh really? that's pretty good!... well, I'm pretty sure I'm getting 13 with my H3, I don't know what's wrong because I was supposed to get 15-16 mpg!
How about you guys (H3 owners).. are you getting the same mpgs?
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\'06 Boulder Gray H3 / Loaded
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06-21-2005, 06:16 PM
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Hummer Guru
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Join Date: Mar 2005
Posts: 3,356
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Sweet story Jim, Ya all belive those stickers???
It does better than an H2 but it is still heavy for it's size so enjoy and after break in you should be fine. Air intake can help MPG a bit.
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06-21-2005, 07:23 PM
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Join Date: May 2005
Location: California
Posts: 37
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Don't forget guys. A lot of you probably still have less than a couple thousand miles on your H3. As the engine breaks in more as you put miles on it, your gas mileage will improve. Your first few fill-ups with the H3 will have the worst mileage. It should only get better with each tank assuming driving styles are the same.
WannabeH3,
You should probably put the airbox cover back on. With the cover off, your intake has a much greater opportunity to suck in the hot air surrounding it from the engine bay. Not only will you be loosing power, but your decrease in power will also reduce your MPG due to the fact that your engine will require to do more work in order to meet your driving style. However, an aftermarket cold-air induction system should accomplish what you are trying to do.
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06-26-2005, 01:16 PM
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Hummer Professional
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Join Date: Mar 2005
Posts: 372
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33" tires, 3200 miles, 14.3 mpg with 50 /50 city and highway driving on my last two tanks.
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06-21-2005, 08:22 PM
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Hummer Authority
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Join Date: May 2005
Location: Redmond, WA
Posts: 1,423
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yeah i just figured if i kept moving it wouldnt be a problem  ill throw it back on today after my fillup
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Drive it like you rented it!!!!
(with insurance)
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06-30-2005, 11:49 PM
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Join Date: Apr 2005
Posts: 365
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17 mpg on the first 1000 miles, all highway.
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