50 cents an hour to work for a guy just starting up a Mobil gas/truck washing and lube station. Was promised a raise "when things got better", of course they never did so I kicked it on down the road when I found something better.
Min. wage @ that time was 2.10/hr (1974-75) at that time I think. Oilfield trucks can get mighty dirty and they have many, many grease fittings!