THIS reply should bring a lot of flak, but I swear it's true!
A friend brought me an old .22 autoloading rifle that "wouldn't work."
Upon inspection, it was gummed up worse than any gun I have ever seen. I cleaned it with WD 40, then brake parts cleaner, then sprayed it with WD 40, wiped it off, and lubed it with BreakFree. Worked fine.
When I asked him what he oiled the gun with he said "Nothing but Rem-Oil."
Go figure.......