In terms of its ability to work at high temperatures and its resistance to contaminants, Mobil 1 is probably over-engineered for use as a gun oil. Fortunately, it's cheaper than specifically labeled gun oils. My car takes 4.3 qt. per oil change; I put the rest of the five quart jug on the shelf to be used on guns. Mine's 10W-30.
I clean with Hoppe's and remove copper with Shooter's Choice or a similar product.
The grease that I use on M1 Garands and elsewhere is also an automotive product. It's
Sta-Lube Synthetic Brake and Caliper Grease, made by CRC Industries. It's Product No. SL3303, and I bought mine at Napa Auto Parts. A twelve-ounce tub was seventeen or eighteen bucks a couple of years ago. Given that I apply the stuff with a toothpick, I'm not paying very much per year for it.
It has graphite, Teflon and molybdenum disulfide (MoS2; "moly" to reloaders) in it, and it's terrific. I bought it after Jim Thompson, the author of
The Classic M1 Garand and
The Complete M1 Garand, told me to lubricate M1 rifles with a grease containing moly and Teflon, if possible. He told me that modern moly-and-Teflon greases work better on M1s than the old Lubriplate which was specified for M1s by the Army in the old days. Lubriplate was not developed as a rifle grease; it was an industrial grease in the first place. I used to use Lubriplate on M1s, but I'm delighted with the performance of the Sta-Lube product.
I use my Sta-Lube Synthetic Brake and Caliper Grease wherever I want to use grease on my firearms. I bet that it would work on auto pistols, too; use your judgment.
