Like Evil D, I understand the desirable anti-friction properties of automotive lubricants for metal-to-metal objects. That said, in your experience, how well does your choice of lube stick/stay with the parts? How much do you use? I'm guessing not much lest it run out and get all over the place. You also mention "very specific parts on specific guns"...can you elaborate? On one hand, I trust the gun lube manufacturers, but on the other hand, I have to wonder if I've been wasting my time and money on traditional gun lubes. Currently, I apply Hoppe's Elite to moving parts except the frame rails on semi-autos where I use TW25 grease. I'll use Rem oil as a surface protectant for the rest. A bit of song and dance compared to a single lube solution, that's for sure.