As a response to the general theme of this thread which appears to be saving a few dollars on products which protect firearms worth $1,000’s or that your life might very well depend on.
All I can say is, “Are you guys kidding?”
The converse is more accurate. It's not "saving a few dollars," as much as not overpaying by 100% for a worse product than nearly free motor oil droppings. Why would you risk your life putting some overpriced snake oil on your firearm when the best product is packaged for automobiles at lower pricing?
Guns and cars are mechanical machines that operate in hot and cold high "rpm" scenarios. What makes gun oil so special that auto makers and oil makers have failed to transition to gun oil to lubricate Formula race cars and production street cars in excess of many tens or hundreds of thousands of dollars? The auto lube industry spends probably many billions of dollars annually on developing engine oils for race cars and high mileage cars, and to meet auto makers warranty needs. IOW, if froglube was so amazing, Mobil1 would be using it in BMWs. They are not.
Car engines run at higher RPMs and far tighter tolerances with sustained 200+ degree heat and are placed under far more stress, pressure, etc. than the workings of most any firearms. Subjected to freezing cold long term storage and heat that would cook a chicken for dinner. Required to sustain tens of hours of continual high rpm use without evaporating, turning to gel, or failing. Show me a gun that could possibly do such a thing, or any gun oil that would not evaporate under such conditions of firing 1 million rounds representing a cross country drive in a car with 1 million RPMs.
Gun oils are, at best, just repackaged motor oils. At worst, they are junk mineral spirits or organic formulas that can cause damage or fail to prevent damage. And you're paying 100x the amount when you pay $15 for 4oz of gun lube, when you can get 32 oz. of premium motor oil for $1 regularly. I bought 350 qts. of premium motor oil today alone, for about 80 cents per qt. which proves the point.