This video from Smyth Busters investigates whether motor oil is a suitable substitute for gun oil. While motor oil provides lubrication for a firearm's action, it lacks the crucial corrosion inhibitors found in dedicated gun oils. This means it can keep a gun functioning but won't adequately protect the metal from rust during storage or after exposure to elements like those encountered during duck hunting. The video explains that motor oil is not harmful to the internal gun parts but is ineffective for external protection. The hosts suggest a compromise: using motor oil for lubrication and gun oil for exterior metal protection to save money. The myth is deemed 'half busted' as motor oil is partially effective for lubrication but not for long-term preservation.
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