Gun grease and gun oil serve distinct roles in firearm maintenance, with the choice depending on the specific application, environmental conditions, and usage patterns. Gun oil is thin, easy to apply, and excels in penetrating tight spaces, making it ideal for moving parts and regular maintenance. It provides good cleaning and corrosion protection but requires more frequent reapplication, typically every 2–3 months, and is less effective under high pressure or in damp conditions. Oil is particularly suitable for high-speed components like locking tracks, slides, and guide rails, where its low viscosity allows for smooth operation.
In contrast, gun grease is thicker and more durable, offering long-lasting protection—up to 6 months—making it ideal for heavily used or rarely used parts. It provides superior resistance to water, high temperatures (up to 200°C), and extreme pressure, making it well-suited for high-load areas such as locking lugs, hinge points, choke threads, and firing pins. Grease also adheres better under mechanical stress and is less prone to running or evaporating, which is especially beneficial for firearms stored for long periods or used in harsh, wet environments. However, grease is more difficult to apply precisely, can attract dirt, and requires more effort to clean off.
For defensive or carry firearms, grease is often preferred because it stays in place for extended periods—sometimes over a year—reducing the need for frequent maintenance and minimizing the risk of malfunctions due to dry components. In contrast, oil may be better for cleaning and removing carbon buildup, especially in small-caliber firearms like .22LR, where a CLP (Cleaner, Lubricant, Protectant) with solvent properties can be effective.
Ultimately, the decision between grease and oil should be based on the firearm’s design, operating conditions, and intended use. For high-speed, low-load areas, oil is typically better, while grease is superior for high-load, low-speed, or long-term protection scenarios. Some experts recommend using a combination: oil for moving parts and grease for high-stress components. Regardless of the choice, applying lubricants sparingly and removing excess is crucial to prevent dirt accumulation and ensure reliable function.
My local shop has been suggesting I use grease over oil because you don’t have to apply as much and is just overall better. What’s the consensus here for AR platforms and pistols?