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...assuming a "midsize sedan" weight class of roughly 3,000 lbs, GM put forth this 'inverse" relationship back in 1999:
(W1 / W2)^(0.72) = (mpg2 / mpg1)
...where:
W1 = existing curb weight
W2 = new vehicle curb weight
mpg1 = existing fuel economy
mpg2 = new vehicle fuel economy
...wonder *how* that 0.72 power coefficient varies as weight increases or decreases?
Last edited by gone-ot; 10-17-2011 at 09:54 PM..
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