oilman

plural oilmen

1. Somebody (especially a man) involved in the production, refinement or delivery of oil; such as an oil field worker or executive, or the owner of an oil well.
2. datedA retailer who sells vegetable oils, and food preserved in oil

   If the wife buys fish or vegetables in the street, as is generally done, she will, at the same time, buy her piece of bacon or cheese at the cheesemonger’s, her small quantity of tea and sugar at the grocer’s, her fire-wood at the oilman’s, or her pound of beef or liver at the butcher’s.

   1851, Henry Mayhew, London Labour and the London Poor, published 1861