Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Open bed or stock cap which is better mpg-

aerohead · 03-08-2011, 07:19 PM

A friend has a 1992 Toyota pickup with cab profile all aluminum cap.Vehicle logbook shows around 3-mpg increase over open bed, 28 vs 25mpg.
The T-100 I have at one time had a Leer straight topper.Memory tells me that it showed better with than without.I'll check.
What your looking at,is a 2-door sedan without a trunklid compared to a station wagon.
Intuition would tell me that it would be impossible to raise the drag with a cap as long as it does not increase frontal area.
Old 1960s SAE papers suggest that an open pickup and suburban type vehicle are equal.If that were true today then it would be a wash and I'd hate to try and live on the difference.

03-08-2011, 07:19 PM	#13 (permalink)
aerohead Master EcoModder Join Date: Jan 2008 Location: Sanger,Texas,U.S.A. Posts: 16,268 Thanks: 24,393 Thanked 7,360 Times in 4,760 Posts	92 toyota did better with it A friend has a 1992 Toyota pickup with cab profile all aluminum cap.Vehicle logbook shows around 3-mpg increase over open bed, 28 vs 25mpg. The T-100 I have at one time had a Leer straight topper.Memory tells me that it showed better with than without.I'll check. What your looking at,is a 2-door sedan without a trunklid compared to a station wagon. Intuition would tell me that it would be impossible to raise the drag with a cap as long as it does not increase frontal area. Old 1960s SAE papers suggest that an open pickup and suburban type vehicle are equal.If that were true today then it would be a wash and I'd hate to try and live on the difference.