I saw a program a couple of years ago which showed Brocky taking a reporter for a ride down some backstreet, with the polarizer fitted, Brocky kept saying "can you feel the difference"..."feel it". The reporter could'nt feel anything, apparantley. I got a lot of respect for Brocky as a driver, honest and to the point, better than his current nemisis. I dont know if it would work or not. I doubt it would have any effect on the car, however it may work if it was placed in a direct contact with the fuel or fuel line.