Safe oil or lube for fuel injector O rings? FUEL INJECTOR O RINGS: COMPLETE TECHNICAL GUIDE Why does o ring material matter? Because a failed o ring means fuel leaks a fire hazard and emissions violation. Color is just a clue. Amazon.com: 4 Sets Fuel Injector Seal O Ring Kit for RC Engineering Fuel Injectors for Honda 1988 2002 : Automotive MotorKote UCL Upper Cylinder Lubricant with Fuel Injector Cleaner 64 o MotorKote.com #13 024 O RING LUBE permatexusa O Ring Lubricant works fantastic on these LS valve covers. Any time you have O rings to install be sure to get your self some O ring lubricant from Permatex. #teampermatex26