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-   -   Truck cap window propped open (

mully 12-31-2009 05:23 PM

Truck cap window propped open
Did you Know

According to this link I lost mpg when I put my truck cap on. Would propping the rear window open help me get some of it back? Today I tried aba testing with my scan guage but the numbers were all over the place being windy out. Check out the photo.

Big Dave 12-31-2009 05:29 PM

No. Not measurably.

Your flush cap has converted your pickup into the aero equivalent of a van or large SUV (Suburban, Excursion).

MadisonMPG 12-31-2009 06:01 PM


Originally Posted by Big Dave (Post 151084)
No. Not measurably.


aerohead 01-04-2010 05:15 PM

I would have expected that you would pick up about 5% Mpg with the cap.

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