|
I use Mobile One Syn 5w20. The indoor range I shoot at doesn't have any heat, unless you turn it on when you get there. One weekend here about a month or so ago it was below zero inside the range. About 20 below outside. None of my semi auto pistols would work correctly until the indoor temp got up to around 30. Good thing I brought along a .22 revolver, otherwise I would have had a long wait. If 5w20 gets too thick for a cold pistol, 15w50 is going to be way too thick. Granted, these are extreme cases, normal people don't shoot when it's below zero, but I'm not normal. But if you needed a gun for self defense at extreme cold temps, you sure as heck don't want it to choke. I've heard of people that use 0w syn oil for cold temp use on guns. Never tried it, but might.
|