Don, Not sure what is "best" - am pretty sure "best" is a unicorn. Viscosity is the driving (no pun) factor for me. I use Mobil 1 15W-50 (also goes in the wife's lawn tractor). In hot weather I sometimes use synthetic 85W-140 gear oil. Both stay put reasonably well on the ASE90 and P-gun hinge areas (M-21s, too). I prefer either to grease b/c it's easier to clean off after use. Have started to use the 15W-50 sparingly for M-12 and 42 locking recesses and action bars. Like it so much I now use it for M16s and Uzis as it doesn't burn off as fast as CLP. Still like RIG grease for lug recesses on bolt guns, 1911s, and such. Prefer lighter weight CLP for .22 rimfires and 391s. Sam
Last edited by Samuel_Hoggson; 10/13/11 11:59 AM.
