I recently conducted a quick non-scientific lubrication test using full synthetic grease vs. full synthetic oil. I fired about 400 rounds using each type of lubricant. Overall, the grease remained in place and provided better staying power in my opinion, but it caused much more fouling. The synthetic oil remained in place and didn’t burn off, but the rails on the carrier looked a bit dry. Also, the BCG had less fouling using the oil. The gun was reliable using both lubricants…zero malfunctions.
This is Super Lube Multi-Purpose Synthetic Grease after about 450 rounds
This is Amsoil Synthetic Firearm Lubricant after about 400 rounds
Sooo, which lubricant do I prefer? It depends. For extended operation between cleanings or operation in dusty environments, I would choose the oil and periodically re-oil in the field if necessary. However, I would use the grease if the weapon will be cleaned on a more frequent basis, since I believe that it stays in place much better.
So, lets open the can of oil…uhh…worms. What do you guys think?