Since I'm a habitually using the Fitness/Nutrition section to think out loud, I figured I'd let it overflow into here as well.
So here's a couple things I've noticed about purpose made gun lubes-
- Most of them suck.
- Their operating range is usually relatively low (160 deg for CLP, for example).
- The crusty stuff on high temp parts is a product of burned lubricant and carbon. Carbon on it's own doesn't cake on and make that nastiness.
- They have a poor viscosity for weapons.
- Rem Oil, for example, seems to be very popular. I see people with that garbage on the range all the time, and it seems to be only slightly thicker than water. It's like sewing machine oil with a bit of a caramel tint.
- Carbon has lubricating properties of it's own, using solvents to remove it isn't particularly necessary. If a lubricant is working properly (penetrating and not dropping), you should be able to wipe parts clean.
So here's what I've been doing for the last couple years- I've been using Castrol Syntech 5W-50.
- Motor oil is exposed to temperatures in excess of 600 degrees in diesel engines.
- Multi-grade oil perform across a broad spectrum of tolerances and temperatures since they have the properties of both oils.
- I use 5W-50 because it's the broadest range I could find.
- Since the stuff doesn't burn off on high temp parts like gas regulators and bolts, I never have to scrape crispy carbon off.
- I also never use any solvents to clean other parts. Since the stuff maintains a decent film wherever you put it, it wipes clean with an oily rag.
What's everyone else using? How about white lithium grease or gear oil?