I have wondered what the people that know what they're doing use in the arctic as well. I have used snowmobile grease on my R-15 between -33 and -35 on the couple of cold days I could find and fired a couple hundred rnds each day with no issues.What kind of oil for sub 40 temps?
I use Mobil1, it does not break down with heat or gel up in extreme cold and is a heck of a lot easier to clean off than grease. I use CLP to clean, but for lubricating all of my firearms Mobil1 seams to be my go to lubricant.
I also follow the above lubrication diagram.
Yup... Though, I just buy any high-temp wheel bearing grease I can get for cheap.
I started the move more recently after realizing how much lube I go through (I do a lot of shooting). Frankly, go through too much lube and most of it is very expensive. Where as with Mobil1 grease for example, I get a 1 pound tub of it for ~$1.70 (It was on sale, reg price ~$2.95).
It also makes less of a mess, it doesnt dry up, it stays where you put it, it works in extreme cold/heat, its easy to clean off.
G96 as a base. It's a metal conditioner. As mentioned though it does soak into parkarized parts. I also use a few drops of rem oil or whatever was on sale for the rails and other bearing surfaces.
I've had G96 in up to -50 for my duty pistol. Doesn't freeze and pistol still racked. Clp and g96 are approved by RCMP. I prefer G96. Also for cleaning you just wipe it down. No scrubbing required. Cleaning time is cut in half.