I'll use this thread to post results of testing on this vehicle. It is a 1991 Hilux, regular cab 4WD:
Starting point is stock except for slightly oversize tires; stock tires were 225/75R-15 but it's wearing 235/75R-15 now.
Test 1: Side Window Flow with Various Mirror Configurations
Mirror open:
Mirror closed:
Mirror removed:
Mirror removed, antenna removed:
I stopped by the hardware store after this to get some weatherstrip and try out small vortex generators on the A-pillars:
Final configuration, outside view:
