How many miles can you drive on a tank of gas?

It all depends on the size of the tank and how many miles per gallon the car can travel. When I have a new vehicle I always check this by filing up the tank full plus a small separate approved gasoline container and zero the trip meter. Then I drive around as usual. When the 'low gas' indicator comes on I note how many miles that is and zero the trip meter. I then continue to drive as usual until I run out of gas. By checking the trip meter I know how far I can drive after the meter warned me of a low gas tank. I then fill up from the spare gasoline container and drive to the nearest gas station and fill up. By adding these two numbers I know how many miles I can drive on one tank of gas and I know how far I can drive when the 'low gas' warning goes off. You can also calculate this by finding out the size of the gas tank and how many miles the car will get to the gallon and multiply these numbers.