Falls into the same category as "rego", "ambo", "garbo"...
Depends on which ones you use. Our local Mobil is manned by a single person and they are always polite to us. Others have forecourt attendants...
Done, I was informed, as part of the state's employment policies - and fuel prices in Oregon, as of last Oct, were no more expensive than B.C., Washington State or California - and they all have self-serve.
My father used to talk of going to the "petrol station" and pulling up beside the correct "bowser" and filling the car with "benzine", even though the gauge read "Petrol"...
Bookmarks