RE: H3 actual gas mileage (Full Version)

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[Poll]

H3 actual gas mileage


16 City 20 Hwy
  33% (19)
14 City 18 Hwy
  42% (24)
12 City 16 Hwy
  17% (10)
10 City 14 Hwy
  5% (3)


Total Votes : 56
(last vote on : 3/28/2008 5:09:16 PM)
(Poll will run till: -- )

RE: H3 actual gas mileage

  

Linus Gump -> RE: H3 actual gas mileage (5/12/2006 10:35:16 PM)

Mileage would be the least of your worrys if you see mine on a lot when the lease is up. I don't drive it much but when I do, its typically destined to go off road before it goes back into the garage. If it's on the lot after the lease, its because I abused it more then I would want to own.

  
jamesh3 -> RE: H3 actual gas mileage (5/28/2006 9:04:26 PM)

I have about 8k miles on mine now - 15+ in the city and 16+ on the highway. 33" tires.

skeeet -> RE: H3 actual gas mileage (5/29/2006 3:16:39 AM)

I have never got less than 16.8 mpg. I do see 20 at steady highway driving. Last tank full just averaged 18 mpg with mixed city/highway. Using Mobil 1 synthetic might help me get another 1 mpg. I do drive non-aggressively in the H3 but make-up for it in the Z06. Ironically, the Z06 gets much better gas mileage at 17 around town and up to 28 on the highway if driven moderately sanely. What will hurt you the most is getting the 5000 lbs H3 to move fast off the line- that REALLY eats up fuel.

racepet -> RE: H3 actual gas mileage (5/31/2006 12:48:53 PM)

I drove back and forth all weekend to my son's tournament. I got 15.8 and 15.4 averaging 70-75MPH.

I will be adding K&N this week and will give feedback in a few weeks.

jbb6811 -> RE: H3 actual gas mileage (6/6/2006 12:48:13 PM)

OK i'm back from taking the kids to Disney. i drove from Northern S.C to Orlando Fla. 538 miles one way.
in the foot hills w/ five people (680lbs) plus around 350lbs of luggage. i got 13mpg+ and in the flats of Ga and Fla
i got 15mpg. i was running around 70-80. i found the h3 doesn't like hills and to save gas don't use the cruise control!
and i do have 285-18's and no mods. i have nearly 5000 miles on it now. please tell me how some of you are getting
16-18+mpg. is hummer paying you to advertise or what? i mean i know it wasn't going to get the gas mileage of
my Z but i would like to avg 16-17mpg.

Linus Gump -> RE: H3 actual gas mileage (6/6/2006 2:06:26 PM)

Your speed is probably the main killer of your economy. Speeds above 60 MPH are proven to kill your economy almost exponetially as you go faster. You can do your own test on that if you want real results. I would have to disagree with the cruise control though. The computer knows what the engine needs for the current load and can regulate the fuel flow better than you can. Also, some vehicles are programmed to provide more power with the cruise then when the throttle is being manully operated. I don't know if the H3 is one of these or not.

racepet -> RE: H3 actual gas mileage (6/6/2006 2:26:34 PM)

Another factor with big tires is wind resistance under the truck, the higher you raise it with tires the more air going under it and trying to slow it down.

Any one know how long it takes to install the K&N 63 system?

Dennis -> RE: H3 actual gas mileage (6/6/2006 2:31:34 PM)

I have to agree with Linus (aka Romeo)[:D]

Cruise control should improve mileage, but at anything above 55 MPH you loose.

When I drove my H3 home, the trip on a brand new engine and drivetrain, I maintained 55 MPH for nearly 400 miles and my fuel mileage was averaging 19 MPG..Never has been as good, cuz now I cruise at 75-80 on city streets and...wait a minute..I mean on the freeways and 35 to 50 on city streets and I average 15 to 16 most the times.

traveller -> RE: H3 actual gas mileage (6/6/2006 5:47:07 PM)

Wow! I now feel pretty good about the milage I am getting. I am averaging 18.2 I'd say 70/30 highway - city. I just cleared 9k miles, following a roadtrip Albuquerque to San Diego. (stock tires).

I have to agree with the comments about speed, I notice a significant drop (on both my motorcycle and hummer) if I am cruising above 60 - that seems to be the breakpoint.

droptopvette -> RE: H3 actual gas mileage (6/6/2006 8:41:38 PM)

I'm only getting 13.4.[:@]

racepet -> RE: H3 actual gas mileage (6/7/2006 2:31:57 PM)

Just got 14.3 last tank, all time record for city. I am giddy!!!

NJTEX -> RE: H3 actual gas mileage (6/8/2006 6:47:31 PM)

With only 2700 miles on the clock and a 6 mile one-way stop and go commute with no highway miles, I get 14 mpg.

Dennis -> RE: H3 actual gas mileage (6/22/2006 8:13:37 AM)

I don't know for sure if I reset the trip odo the last time I filled up, but I usually do...But as most of you all know, I have had my PCM reflashed with a performance program recently (experimental) and anyway, I filled up last night at about a 1/4 tank down and I had 140 miles on that tank and it took 6.2 gallons to fill up again...If you don't feel like doing the math right now..that figures to about 22.5 MPG..Before I throw a party..I'll do this again under the same driving conditions and see what I get next time.

hummerific -> RE: H3 actual gas mileage (6/22/2006 8:33:29 AM)

[sm=interesting.gif]

HummerGuy123 -> RE: H3 actual gas mileage (6/29/2006 8:05:47 PM)

Just completed a road trip from LA to Sonoma back down through Big Sur. I got 16.9MPG going 70 and Santa Barbara traffic. Probably translates close to 19-20 at 55-60. Can't complain. I passed a very slick Unimog camper and he was lucky to be going 50, cool truck though.

  

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