Quote:
Originally Posted by pruettfan
I am not sure you are correct. Removing 4 lbs per wheel has a significant effect on the performance of a car. Car and Driver had an article a while back that addressed unsprung weight's effect on acceleration and braking. I would guess that if reducing unsprung weight improves acceleration and braking that would be more likely to be the reason for improved MPG.
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MPG is a different animal, entirely. If 16 pounds of weight were significant in terms of mileage, you could see a difference in fuel economy between your gas tank being half-empty vs. a full tank. A fraction of a MPG, perhaps. Several MPG? No way. But rolling resistance has a LARGE effect on fuel economy.