I have added Zig-Zag Vortex Generators aka a Turbulator on my side rear view mirrors.
Frankly I don’t feel or hear anything different and do not expect to find a measurable effect on the mpgs. I also do not see the potential for any large or measurable negative effects.
Then I added Zig-Zag Vortex Generators aka a Turbulator on the front A Pillars and there is a dramatic reduction in wind noise. There is still some left but it is dramatically reduced
Given that Toyota has used Vortex Generators on the Tacoma outside rear view mirrors and there is some excellent glider data for the Zig-Zag Vortrex Generators I thought that I would go for it and am much more than pleased at the results.