Caddyman Long Lost Magliozzi Brother
October 2007 edited October 2007
Two facts. A friend of mine had a '78 Chevy van with a 350. He changed the oil twice a year and always used STP. last time I saw that van it had 380,000 miles and was still going. It was on it's third transmission.. The heads and oil pan have NOT been off this engine.

When resizing cartridge cases in a die made for that purpose, Only two lubricants will work to keep the brass cases from sticking/jamming in the die. A special and expensive die lubricant or straight STP. Other oils, even 90 weight gear oil, will not prevent sticking like STP does..

STP. Scientifically Treated Petroleum... So what is the downside? When it burns in a worn engine, it leaves a LOT of deposits on the spark plugs and exhaust valve stems...