I mean Napier's Power Airgun Oil, Ballistol, MP5, etc? I've been using the Napier Airgun Oil for the bluing and barrel cleaning for several years now and recently I got some Ballistol to try out. For my blued guns I like the Napier stuff. For the Stainless look I favor Ballistol. I think it cleans the nickel surface better. What's your take?