I know the motor oil concept is hard to swallow for some...but keep in mind that motor oils were made to lubricate pistons running inside a combustion chamber. Heat? fire? explosion? yep,,,just like in a rifle chamber.
I learned the motor oil trick from my days on the Grenze...I was bored sitting in the border camp so I started to read up on the TM's and FM's..in the Survival FM..it actually suggest you use motor oil.
Of course, I also have CLP, and have gome through many many gallons of CLP, not just on my personal stuff, but on the Main gun, crew served, M240's and Ma Deuces. so I am not excluding CLP, break free, LSA, Kroil, Tatra, or any of the other stuff...But apart from slight viscosity differences, I don't find that much variance in performance.
But in the end, it's your gun, your choice...Just sharing my experience for what it's worth.