Why is it incorrect to say "we ran out of gas." when referring to your cars energy source?

Because when the gas runs out, there is still energy in the car, but another form of energy.

Explanation:

Car, motorcycle, bus, and truck engines produce motion from a chemical reaction known as combustion. We can say that the chemical energy of gas in a car is converted to thermal energy during the explosion of gasoline or diesel. This released thermal energy causes the engine to tighten the engine piston, producing movement and hence kinetic energy.

However, the car has other forms of energy as it needs an entire electrical system to function. For this reason, it is wrong to say that "We ran out of gas." when it comes to your car's energy source.