When filling up gas in a car why does the first notch at full take the longest to go down, then all subsequent notches go faster?

Question

When filling up gas in a car why does the first notch at full take the longest to go down, then all subsequent notches go faster?

In: 0

Answer 1

There’s a linear sensor in a tank that isn’t rectangular. Ultimately it’s not worth the time to engineer a sensor that accurately accounts for the curvature of the tank. Much easier to make one sensor for the whole $Brand fleet and use it no matter what shape and size the tank is.

The sensor is probably (I’m guessing) designed to produce very accurate readings for the brand’s flagship car. Every other model gets “good enough.”