I worked at a Chevron station in the late 70's. We had two lubesters out back, one for kerosene, and the other for bulk 10w40 oil. Can you believe that we were still selling kerosene in the early 80s? The kerosene was sold to whoever wanted it, the 10w40 was used in the service bay, instead of opening all those cans. The station lasted into the 90s. As they had a large customer base, I'm sure that the lubesters were used until the station closed. The lubester had lost its high visibility position out on the pump island with the introduction of the quart can, but the stayed around for quite some time. I think that they have probably been replaced by the 55 gallon drum, in most cases.
Here is a shot of my lubester, and one of my barrel pumps. This particular one is a Smithway (A.O.Smith) barrel pump. I've got about five or six barrel pumps, but only one lubester. I wish it was the other way around.
In my opinion, the lubester is not a very desirable item right now. But then again, there was a time when people wern't too interested in electric pumps either. For myself, I really like lubesters, and wish that I had a few more...
Nice find Michele...