A superior gun oil for all climates. Reduces the friction between mating surfaces. Will not gum up or lose its viscosity under extreme temperature variations from -55°F to 300°F. The natural solvency of Synthetic Gun Oil cleans as it oils while its low evaporation rate assures protection against rust. Excellent for lubricating and protecting all firearm metal surfaces. – See more at: https://www.birchwoodcasey.com/Cleaning-and-Maintenance/Synthetic-Gun-Oil.aspx#sthash.6fO8CAEd.dpuf