A different car can travel 30.5 miles for every gallon of gas used

Step-by-step explanation:

Yes, this distance will be different depends on the car, exactly the car's motor, we could have the same gasoline litter but if we have a car with a small motor the gasoline would last longer.

For example:

A small car could travel more miles than a big car with a v6 motor, a small car could use 4 litter in an hour, in a truck could use 8 litter or more in an hour depends on the motor, assuming we traveled 24.2 miles per hour.