Most gun oils start off with about the same base as motor oils. Solvents, water displacing chemicals, polarizing agents and other things are added to the motor oil base. I think that some of the improved oils do work better for long term corrosion prevention but about the same for lubrication.

When I have left over light weight motor oil or even heavy weight I will dump all the odds and ends remnants of various gun oils in with the motor oil to get any advantage the gun oils may provide. Not sure it makes much difference but gets rid of the half empty bottles. If it is heavy weight I add Eds Red or more solvent to it.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli