OK, if polls about daily drivers and first cars are acceptable, then I'll start this one.

Everybody has a can of 3 in 1 oil somewhere in the house or shop. How old is it; how long has it been around? We never use it up. I have a can that's been around as long as I can remember. It's a metal can with a cruddy top. There is no bar code on it, so that would date it back to the 70's, I think. Anybody have an older can around?