Quote:
i have found a page testing vehicles around the same weigh size as the H3 with smaller versions of the diesel used today
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Ok show us the link.
As a rough estimate a 3.5L turbo diesel should have twice the fuel milage and more HP than a 3.5L gas engine.
Were the tests done with a turbo diesel or nonturbo?
A 3.5L diesel should have no problem pushing the H3 and I also would like to know why a smaller Duramax would not work in the H3?
What you're saying does not make much sense