Scientifically speaking...it would take you an hour or so to make around 12-14 of those vgs and stick them with tape on the car.
They seem to work on this SUV? Similar in contour to your car?
"We are both most impressed with the AIRTABS. Stability and smoothness of drive were markedly better. Even in wind conditions or when passing big 18 wheelers, where the CRV shook and moved before, it was as steady as a rock with the AIR TABS on. Also we were getting 485-500 km ( 301 - 310 miles) to a tankful of gas on the highway. Our most effecient recollection from before, and we have over 155,000 km ( 96,255 miles), was squeezing maybe 450 km ( 279 miles) out of a tank. This 7- 10 % saving on fuel is awesome! Thanks for putting the AIR TABS on. We are already getting questions from curious family members and neighbours. Cheers."