Smyth Busters: Is Motor Oil a Good Substitute for Gun Oil?

Published on December 15, 2020
Duration: 2:53

This video debunks the myth that motor oil is a suitable substitute for gun oil. While motor oil provides good internal lubrication, it lacks essential rust inhibitors crucial for protecting firearms from corrosion, especially in humid or salty environments. The hosts recommend using dedicated gun oil for external protection, even if motor oil is used for internal action.

Quick Summary

Motor oil can lubricate firearm actions effectively but lacks essential rust inhibitors found in gun oils. This deficiency makes it unsuitable as a complete substitute, particularly for protecting external metal surfaces from corrosion in humid or salty environments.

Chapters

  1. 00:00Intro: Motor Oil vs Gun Oil Myth
  2. 00:30The Key Difference: Rust Inhibitors
  3. 01:05Real-World Consequences: Louisiana Duck Hunting
  4. 01:40Final Verdict: Compromise Recommended

Frequently Asked Questions

Can I use motor oil instead of gun oil on my firearm?

While motor oil lubricates well, it lacks the essential rust inhibitors found in dedicated gun oils. It's not a complete substitute, especially for external protection against corrosion in humid or salty conditions.

What is the main problem with using motor oil on guns?

The primary issue is the absence of rust inhibitors. Motor oil protects moving parts but fails to prevent rust and corrosion on metal surfaces, as demonstrated by firearms used in humid, salty environments.

What is a good compromise for lubricating firearms?

A practical compromise is to use motor oil for the internal lubrication of the firearm's action where slickness is key. Then, apply a dedicated gun oil (CLP) to the external surfaces for crucial rust and corrosion protection.

Does synthetic motor oil work as gun oil?

Synthetic motor oil offers excellent lubrication, making firearm actions feel very slick. However, like conventional motor oil, it lacks the necessary rust inhibitors that dedicated gun oils provide for long-term metal protection.

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