I couldn't find Mobil 1 0W30 at Murray's so I bought a quart at a Mobil gas station. Cost a hell of a lot more than $2, I'll tell you.
Using one of those Brownell's pinpoint oiler bottles, I figure that quart is two-lifetime supply! Or at least until I'm as old as RJ Hedley!
Seriously, a quart of oil will last a single shooter a long, long time. And I should only be as active as RJ when I reach his age. He makes a really great holster, and mag pouch, and StopStick.