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?

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Answer 1

On top of the other answers I’ll add that small changes at the bottom of the range are much more important than changes at the top. That means that a non-linear scale is actually quite helpful.