David there was on analysis that placed the average gun oil at approximately oil 5 weight equivalent. Many folks use synthetic motor oil at 1/20 to 1/100th the cost of gun oil. It was also determined that Automatic Transmission fluid was a better lubricant for firearms than motor oil although more expensive. That said, I have been using mobil 1 synthetic (the same I use in my vehicles) with no issues for many many years.

Yup, I use Mobil 1 oil for my guns and cars. Hasn't let me down yet!

Hi David there was on analysis that placed the average gun oil at approximately oil 5 weight equivalent. Many folks use synthetic motor oil at 1/20 to 1/100th the cost of gun oil. It was also determined that Automatic Transmission fluid was a better lubricant for firearms than motor oil although more expensive. That said, I have been using mobil 1 synthetic (the same I use in my vehicles) with no issues for many many years.