Why is it cheaper to completely fill your tank in one go than to fill it in small increments over a long period of time?

Question

I don’t know if it’s true but it’s what I have been told by a few different people.

In: Economics

Answer 1

it’s not exactly true. if you kept the gas at less than half, you’re carrying a lighter load, thus saving yourself some fuel. and if the gas station is on your way home and you didn’t shut off your engine while pumping, you’ll save a little more.