For a couple of dollars more, buy a gun oil that says it prevents rust. A bottle lasts ten years for many shooters. Isn't your rifle worth pennies a year more by investing in a specialized oil?

These are gimmick exposuretests that do not work/protect in various/numerous conditions. When they start showing the results of this test with gun barrels as the object of testing, then I will believe them. Sometimes you even have to be careful about readingbarrel corrosion testing. We recently had a thread that showed WD-40 worked very well on the barrel exterior. Forum members here became estastic.But no testing was done inside the bore aftercareful reading exposed the dubious play-on-words that the testing author used.

Always read between the lines - always read the fine print with these tests. Read slow & you usually will find a slip-up or a big gap/missing chapter somewhere.