Yes, Fuel Oil Trucks used them, I believe most of the cans you see are for Fuel Oil Deliveries. They would fill the cans and walk them up 3 flights of stairs sometimes, (as my Father has told me from experience)/ The Gas ones were usually used at Gas Stations by the Weights and Measures guys to be sure the pumps were pumping what they read on the computer, They usually have the longer necks on them.

"Remember, history that is forgotten is doomed to repeat itself!"