I used to think you needed one on a turbo car to prolong life of the turbo… then realized that the only time its really needed is if you like to do WOT pull then just shut your car off :lol
I used to think you needed one on a turbo car to prolong life of the turbo… then realized that the only time its really needed is if you like to do WOT pull then just shut your car off :lol