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Old 10-26-2010, 02:05 AM   #7 (permalink)
bestclimb
Smeghead
 
Join Date: Oct 2009
Location: South Central AK
Posts: 933

escort - '99 ford escort sport
90 day: 42.38 mpg (US)

scoobaru - '02 Subaru Forester s
90 day: 28.65 mpg (US)
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the rotating mass, aero drag and what not will not change with a reduction in weight (perhaps a small bit as it comes up off the springs, I have it on good authority that 5 angles can dance on a pin head) The rolling resistance and friction in the drive line will be slightly less with reduced mass.

I know that the plural of anecdote is not data. I have noted that my mileage is often less with other people in the car. I think it is because my coasts carry farther and end up having to use more brake. It is also just as likely that I am not paying as much attention while carrying on a conversation while driving.
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