i don't know, but i do know that it kills the acceleration in some cars. I took Nature Boy's pink cadillac out for a spin....ok....i stole it cuz he was forcing me to go to another "leather man" party and i feared for my orifices. well anyway, as Nature chased after me with his friends Big Willy and Leather Larry, i noticed i could hardly outrun their morbidly obese asses when i realized the AC was on. once i turned it off, i high taled it out of the city. That's the last time i ever believe you Nature Boy when you tell me, "no, Freak, we're going to this supermodel party with all these chics from Maxim. yeah, sure, whatever.