I'm just thinking out loud...

I think that Monolec 30 weight oil is targeted to purely commercial uses like massive marine engines. I looked into it, and it seems like there were no small quantities available, the question ended up being more like...how many 55 gallon drums of the stuff would you like to order? And my answer to that question was...I'll just buy the small tube from Crosman once a year. I really don't like getting price gouged, and I've searched out MSDS sheets many times to "get to the bottom of it" before, but there are some fights that just aren't worth fighting. And I think the Monolec/Pellgun oil issue is one of them.

Also, I think RWS sells pure silicone in a small bottle, I think its their "air chamber lube" which is different from their "Spring cylinder lube". Somebody here will be able to clear it up I'm sure.