The number of miles you can drive in a day depends on how much you're willing to spend. If you're renting the car for just a few hours, then you might not be able to cover too many miles. However, if you're renting it for an entire day or even a week, then you can easily drive up to 500 miles without any hassles. Just be sure to keep track of the number of miles you've driven and refuel the car as needed.