at best it does nothing, at worst the ptfe is trapped by the oil filter. Since the government made the makers of Slick 50 admit that their claims are false I thought that people stopped using that product, I wasn't aware that it was still in production. Personally I wouldn't use it because I can't see how ptfe can adere to metal parts of an engine like they claim it does. I'd rather spend the money on a good oil. | 
