Somewhere on the net a few years back I saw a link to a test a guy did with various gun oils.

This was simply a corrosion test. He got sixteen penny nails and put them in several five gallon buckets with holes drilled in the bottom. Now a sixteen penny nail will rust if you look at it cockeyed.

He coated the nails in the buckets with various gun oils and left them in his yard. At the end of the test period the only bucket of nails with no corrosion was the one with Breakfree CLP.

It's a pretty unsophisticated test but pretty darn clever.

I wish I could find the link.