Quote:
Originally Posted by MetroMPG
I suspect zigzag tape would only "work" where there's laminar flow. It's just too thin, and the boundary layer is way too thick and turbulent over most of the car -- and getting worse the further back you go.
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1 mm is definitely too thin at the rear of a car, but enough on the A-pillar.
Glider zig-zag tape is usually only half that thickness, so DIY would be the way to go for anything but the front.