When the gas guage looks like this, both Checkered and I are happy.

But when it gets to half-full, I start to think about nearby gas stations.
When it gets to half-full in Checkered's car, he doesn't even notice.
When it gets to under a quarter of a tank and the light comes on, I panic.
When it gets to under a quarter of a tank and the light comes on for Checkered, he thinks, "I can go several more miles."
When the "lo fuel!" sign comes on, I lose the ability to think reasonably.
When the "lo fuel!" sign comes on for Checkered, he thinks maybe he should stop at the gas station...sometime.
In fairness to Checkered, he has never run out of gas in the years I've known him.
Then again, neither have I.