A lot of people on here have oil stashes, ranging from modest to ridiculous. For people who do this, is this something new you are doing, or have you always had a stash of cheap motor oil to do your own changes, top-ups, etc..? I would think that for a lot of people, it would be a newer thing, as engine oil seems to be much easier to shop for and buy than it used to be...being availiable at every type of store you can imagine. From what I can gather, in the past it was only avaliable at gas stations, and even then, how much oil would a small gas station have in the 1960's or 1970's? How could someone develop a stash, unless they cleared out a few stations?