well Jim I also look at it like this... They have .6 Litre more displacement to deal with, so that will drink up a bit more fuel.. Lets say your motor was a 245ci( I know I am close) and the 4.6 is a 280ci ... There is a bit of a difference in terms of how they will use fuel..
I do think that the 3.71 Gear ratio was nuts on GM'* part.... I think 3.47 wouls have been well beyond what they needed.... I think the 4.6 could have turned a 3.05 - 3.29 with good numbers all the way around..
And I haven't asked, but how many miles do you all have on your motors? Are they even broken in yet?
And yeah Jim when you drive that GP.... You really burn off fuel when you get into BOOST
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