I was in the local mom and pop indie convenience store this morning and way back on the dust-covered shelf they had some STP oil treatment dated 2004. The label says it contains olefin copolymer zinc dialkyldithiophosphate. It's the good old think stuff that you can't hear slooshing around when you shake the bottle. They had about 16 bottles on the shelf and the best part is that there was a price of $1.89 on the bottle. I held my breath as the lady scanned it and the scan didn't register, so she manually rang it up as $1.89. My question here: Is this the original good stuff with the high zinc concentrates? I'll be building a couple of engines this summer with mechanical lifters and, along with some good detergent oil, I'm planning on using this stuff for the initial break-in oil.
Yea, I'm planning on getting the other 15 bottles.
Yea, I'm planning on getting the other 15 bottles.