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UFO · 02-14-2011, 04:17 PM

Heavier vehicles have higher rolling resistance, which is proportional to speed. Heavier vehicles also tend to have higher frontal area.

02-14-2011, 04:17 PM	#6 (permalink)
UFO Master EcoModder Join Date: Sep 2010 Location: Denver, CO Posts: 1,300 Colorado - '17 Chevrolet Colorado 4x4 LT 90 day: 23.07 mpg (US) Thanks: 315 Thanked 179 Times in 138 Posts	Heavier vehicles have higher rolling resistance, which is proportional to speed. Heavier vehicles also tend to have higher frontal area.