The firearms lubricant market is full of hype, ludicrous claims, and snake oil. Stick with a good brand, avoid the “new” and “hot” products. I’ve got AMSOIL, G96, and Wilson Combat on my shelf. For storage and/or wipe down, I’ve got Corrosion-X which is a great product.
I would buy HPL in a heartbeat but here’s the issue; properly used, a few ounces of gun oil lasts me forever, even shooting a couple time a month.
That’s why I don’t use motor oil - real Gun oil costs very little when you consider how much you use. A drop here and there costs, what, a penny or two to lube a gun, even if the stuff costs $8 for a few ounces?
Where is the “savings” then for using a less than optimum product on your gun? I spend hundreds-or thousands- on the gun. Hundreds in ammo each time I shoot.
But saving 2 cents now and then by using motor oil, at the risk of having it gum up or fail to protect from corrosion, is somehow a sound financial decision?
I shoot a lot. A big hobby of mine. Gun oil as an expense in the context of guns, optics, and ammo, is so minuscule that I laugh at “saving” a few pennies on each maintenance/clean/wipe-down.
Just use the good stuff, a product designed for guns by people, like HPL, that formulate oil for a living. Skip the “frog-lube” hype and save your leftover motor oil for generic oil use. I put mine in an old-fashioned oil can for general use.