I still have my Grandfather's last can of 3 In 1 with the screw on tip that looks like lead. He used it in the house for just about everything, including his guns. The ranch equipment and pump house got serious oil and grease, by the bucket full. I use Mobile 1 and compressor oil in my metal shop, in squirt cans, to keep things spinning and turning. I use G-96 on my guns when I put them up or go to the field. A couple of squirts down a shotgun barrel, let it set for two hours, a bore snake a couple of times and it takes plastic and lead right out.
Ed