Ruger
FRF Addict
I've never seen a Red Line product on the shelf, and have never seen Royal Purple motor oil on the shelf.
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Nope. Actually Amsoil has been shown to be.something to think about is cold pour in the winter.... some of these are poor. Mobil appears the best at that.
I've been using Penzoil Platinum also, mine is super quietPennzoil Platinum and Ultra Platinum both have a great cold pour. I’ve had no issues at all running it. Never had rattle once.
Was also curious about how the Shell Gas Truck oil will do.