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Old 07-26-2008, 02:03 PM   #9 (permalink)
Gregte
EcoModding Apprentice
 
Join Date: May 2008
Location: South Dakota
Posts: 117

GMC Sonoma - '94 GMC Sonoma
90 day: 36.97 mpg (US)
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Quote:
Originally Posted by Tourigjm View Post
...I'm wondering if more weight = better mileage in more powerful vehicles cause it makes them hold their momentum/coast longer....t
The power of the vehicle does not matter. But the fact that you have to carry the same weight UP a hill before it can help you go down, does. And if you are referring to just level ground, you have to accelerate all that weight before it can hold any momentum.

More weight also increases rolling friction, also regardless of the vehicle's power. Unless you go down hill more than you go up (not possible on a round trip), more weight always means poorer FE.
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