I bought the Lucas product because of the applicator, as said above, at FG&G - one for my shooting bag, one for my cleaning bag, and one for a place so special I can't find it. Now with the Amazon bottles posted above, I am reevaluating my life choices. Do I buy the empty 3-pack? I don't know, because as
@fieldgrade says, "I have people for that." As in Lucas. The bottle in my shooting bag has been there a couple of years, I shoot almost every week somewhere, and I haven't used 1/4 of it yet. The 3 bottles of Lucas might last me my lifetime, assuming I can find that 3rd bottle.
Also, I have an interest in a small fuel-additive company that does some business with Lucas, so I feel a certain sense of loyalty buying their product.
I also use Remoil in the aerosol can because it's easy, and because my shotgun shooting buddy uses it on his $25k Krieghoff.
I have a bottle of Valvoline Gear Oil, synthetic 80W-90, that I bought 15+ years ago at a yard sale for maybe $1. I seem to recall buying more than one and giving the others to my Dad and Brother. I just checked and I have 30 oz. left, so Amazon here I come.