If this is Lee's quote, it is you that seems to be confusing the oil treatment with the fuel treatment, as it clearly says "STP motor oil treatment"
Back it its heyday -- Remember Andy Granatilli? STP was often recommended as an engine assembly compound or lubricant because of its high film strength to help keep parts together as things are being torqued and to provide initial lube while the oil pump fills up all the pathways on initial startup.
So far this is about the best thing I've found for cleaning my .22lr suppressors -- penetrates almost as well as Kroil, is a lot cheaper, and does a good job of carrying away carbon particles. A bit on a paper towel to wipe my hands afterwards is the fastest way to remove the black that gets around the fingernails when doing "dirty jobs", followed of course by a good soap and water clean up as it has a bit of stink you need to wash off.
I think when your press needs lube, darn near anything works to make a big difference -- even simple Silcone Spray lube slicks up my Dillon after its started to get "rough" from usage.
