Check out this vintage borchure that someone would grab at the Shell Gas Station back in the late 60ies, Early 70ies maybe. Thought that these Answer Booklet from Shell were worth a quick scan.
Shell Answer Book #3 – The Gasoline Mileage Book – How to save gasoline when you buy a car, drive a car and take care of a car.
So with the invention of fuel injection motors some of the information inside this booklet wrong.. Tho there is a lot of knowledge in here that you could use say you were a new driver maybe. Or if you have a classic vintage car thats pre 1985 when it was invented, I think? I wish that I would have known about these tricks when I had my 69 chevelle back in the day.