I have used Greased Lightning® on most of my machine tools and firearms for years. It has the PTFE (Teflon®) in it combined with a detergent 30wt motor oil. As far as I have researched PTFE is the slickest thing known to man. Lubes have to do several things beside just be slick. First of all they have to stay at the location that needs the lube. This is where viscosity comes into play. With an area like around the barrel where there is a lot of room and movement between parts you need a higher viscosity, like grease or heavy oil, to keep the lube in the place its needed. In pivot points you can use a lighter lube. PTFE is slick, I once did a small test with my metal lathe tail stock using a spring scale. Testing the amount of force needed to move it after lubricating with different products. Thoroughly cleaning with solvent between each product. When comparing each type, grease, med wt. oil and light oils, anything with the PTFE in it was far better that without. The only reason I use Greased Lightning® brand is because it is cheap at K-Mart. There are a lot of products out on the market with PTFE someone may want to experiment with some of them.
