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Old 08-07-2017, 08:36 AM   #4 (permalink)
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Join Date: Feb 2011
Location: Phillips, WI
Posts: 984

Nameless - '06 GMC Canyon
90 day: 37.45 mpg (US)
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CFD (computational fluid dynamics) models are only as good as the highly skilled analysts who use them. They spend a lot of time "verifying the model". This is analystspeak for adjusting the inputs until the model gives correct answers. The verification needs to be done on a model that is similar to the problem under study and where the solution is well known. Wind tunnels will not go away any time soon.
The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG, while summer 2016 mileage was 38.6 MPG without the wheel covers. Drove 33,021 miles 2016-2018 at 35.00 MPG.
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