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Hummer Knowledge Base

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Fuel & Fuel Systems/Mileage:

I note many questions about mpg with HUMMERS. Having put about 3,000 miles some months on turbo, non turbo, and gas engine HUMMERS my experience is:

    Turbos:

  • 10.5 mpg worst at 83 mile per hour
  • 14.2 mpg best driving easy under 55 miles per hour easy stop and go

    Non turbo:

  • 10.00 mpg is worst at 78 miles per hour
  • 13.2 mpg best

    Gas:

  • 3.8 mpg worst at 78 miles per hour
  • 6.8 mpg best easy in town driving

These figures with multiple tank fills with care on fill level being checked and mileage checked carefully. Though not scientific, it is close to reality. NOTE: Big block Chevy Suburbans and other makes will not get better fuel economy - most people do not do consistant multiple fill checks for overall mileage.

Dennis Kulp
MEDVED HUMMER


Dennis:

I agree with all the numbers except the gas one's. When I had my gas truck I would get 7 mpg in the winter around town. 8.5 around town in the summer and the best I ever got on the road was 12 going 60 mph. Usually I would get 11 mpg on the road. The only time I got numbers as low as 3.8 was when I was off roading.


Concerning fuel mileage with our non turbo diesel.

10 TO 11 MPG PULLING OUR TRAVEL TRAILER UP AND DOWN MOJNTAIN PASSES WITH A GCW OF ABOUT 13,500 POUNDS (1000 lbs under the rated limit)

15mpg highway without trailer using sane legal speeds.

Exploring the outback on dirt roads (15 to 20 mpg)

john sinnar


Hmmm... I own a 95 gas wagon and over my year-and-a-half experience (around 17k miles) during which I consistently tracked and calculated fuel economy at every fill-up (and there are a LOT of 'em in there, believe me), I have never realized less than 9 mpg for a single tank of gas. While I haven't carefully tracked fuel economy at different speeds, the overall average sits somewhere between 10 and 11 mpg, with a high watermark at around 13.5.

Dennis Minium


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