FlorrieLindley Salutes! One ex petrol pump attendant at your service! (we were required to salute VIP's, senior citizens, police officers and the RAC!) also many years of riding under my belt.
You already know you're right, but if it helps you're referring to to the Automated Petroil Mobile Mixer Pump which certainly did exist and was part of my list of daily duties to maintain, refill and use 45 years ago!
It was a mobile pump rather than connected to the underground tanks, and was wheeled in and out at the beginning and end of each day along with the fire extinguishers, sand buckets etc.
We worked in gallons, quarts and pints and it was usually filled up with two star petrol (it's lower Octane, approx 87, if he doesn't know
) and a selection of three different viscosity's of motor oil.
The attendant selected the appropriate grade for the bike and it delivered the petrol and oil ready measured.
By the 70's most fuel stations had replaced it with a much smaller wheeled Redex pump that the attendant was required to put shot/s of into the tank prior to fueling, and needed to pay attention to spraying the Redex with the correct amount of petrol to mix it. (At that time the public weren't trusted to fuel their own vehicles safely.) We still had both pumps and a steady stream of British bikers. There was also a general expectation that Petroil or Redex should earn the attendant a small tip.
My job at that time required me to be able to fuel vehicles, (2 star, 4 star or Derv- diesel) check oil and brake fluid, water and washer fluid, and fill tires with air at the correct pressure and advise motorists on the correct fluids and in some cases correct oil viscosity to petrol ratios.
For a small additional charge I could also be required to replace a fan belt or adjust a motorcycle chain, if needed by removing a link, change a tire or fit a new inner tube all while being often patronized while I worked.
I was also required to 'always be neat,and tidy in the execution of my duties', not swear and wear blue eye shadow to match my royal blue overalls! (White coats were two generations earlier.)