Just thought I would ask yet another dumb question....this time on automotive grease, used in cartridge guns. When I was a kid, I worked on a pipe laying crew, and would grease the tracks of the big machines each morning. And, there were no cartridges, you just placed the end of the open gun in a tub of grease and pull up to load. Course, used several tubes each day, so my question does not apply to this early task. My question for those of us who have to own, store and use these things is this. On most types of grease, I have a leak of oil from the tube, and keep mine in a bag that will have a couple tablespoons of oil in the bottom, or on the floor. Have any of you found a grease that does not separate so easily in the gun. I have even tried Schaeffer, whose lubes I like, to no advantage in this. Any ideas from experience.