As far I have found out even though it looks like STP its not. Much better. I put in my rig in the oil and trans. Works great. STP just thickens the oil where Lucas coats all moving parts with a high strength film so nothing starts dry and helps handle high temps. STP is good for oil burners mainly but does not work like Lucas. As I mentioned in my last post most of the parts stores carry it and sell a bunch on it for trucks large and small and about anything else. Even the engine shops told me its a good product and not a gimmick. I hope this helps those who are wondering. H.
