That matches my results in the past, a 3-mpg improvement.
I went a little off course on my current truck to achieve down-force and a off-road stance, so it's been a wash mpg wise with much improved safety at speed and on wet roads.
My lawn edging chin spoiler now has a large cut in it and deflects easily. It's held together with foil tape. I hope to get a conveyor belt on there soon.
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George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
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