Here’s an amusing bit of trivia: The Ford Model T had a ten gallon fuel tank mounted to the frame beneath the front seat that relied on gravity to make the gasoline flow from the fuel tank to the carburetor. This worked fine on level roads, but it meant that when the car was going up a hill and the fuel level was low, the gas sloshed to the back of the tank and couldn’t reach the carburetor. The car wouldn’t go.
The solution? Drive up hill in reverse!
I’m using this tidbit in my 1924 mystery novel! It’s too much fun to ignore.