Bottom line is that a little will last a long, long time. Forgot I also have a few small .5 oz of Break Free from my military days. For my shotguns and pistols I only use Hoppe's. Lucas gun oil might be ok as well, I dont know, but I figure my Hoppe's will last me well into my 90's at my current rate , unless I buy even more guns, but my wife might frown on that.