Not to jump in and piss people off, but as a Toyota tech, neither I or anyone at the dealer would ever put any silicone (FIPG) on the Oil Pump O-ring..and believe me I love the stuff, but O-rings dont need it...gaskets yes. The only thing FIPG on the o-ring is going to do is make it a pain in the ass to replace it because you have to clean it up. Maybe an aftermarket O-ring doesnt seal as good but Ive never had any problems with the factory part.