When you say "separate" what do you mean? I think simply to say motor oil "is for motors" is a reductive statement that doesn't really answer the question of why the application of Mobil 1 is inappropriate for a firearm - it may in fact be such, but on what physico-chemical grounds? The answer would have to include information on the film properties of Mobil 1 versus those of the more "high-tech" gun-specific lubricants.
Corrosion prevention is a distinct subject...more about that later.
Thanks for your input
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