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Go Back   Hummer Forums by Elcova > Hummer H3 Discussion Forums > General H3 Discussion

 
 
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Old 01-06-2007, 02:19 PM
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Default Re: V8 H3 Alpha

Quote:
Originally Posted by Steve - SanJose
I don't see a V8 as a solution for better fuel economy. The brick-like shape, nearly 5000 pound curb weight and offroad drivetrain of the H3 are the main reasons for the mediocre gas mileage and it's really no surprise.

The current EPA mileage ratings don't resemble reality anyway.

Of course dreaming of a V8 for better road performance would sure be nice...

Have to understand why a larger engine can obtain better fuel mileage.
To obtain a set speed, you don't have to give it as much fuel. True, you are actually using fuel in three more cylinders, but are you using as much to move the mass off the line.
Highway driving, now you are using five cylinders at all time. With an AFM V8, on the highway, you will only be using 4-cylinders. Good case is the Escalade that went to a bigger engine and is obtaining better fuel. Part of that IS due to the six speed trans and the gearing, but part is due to the AFM system used on the engine.
As for EPA, remember, 2008 ushers in the new ratings, so the V8 will appear to get worse, while a I-5 will also appear to obtain worse milage than the 2007.
Time will tell if it gets better mileage, the same mileage or a few miles per gallon less.
Time will tell if there is a V8, and then we get to see how GM Marketing markets the vehicle to the public.
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