Before renting out a vehicle, make sure the renter understands how mileage is handled.
If you offer unlimited mileage, factor the extra wear and maintenance into your weekly rate. If you have a mileage limit, make sure it's clearly written in the rental agreement and explain any additional charges upfront.
This is especially important when renting to gig workers who may drive significantly more than someone using the car for personal transportation.
Keep track of the mileage at pickup and return so there's no confusion later.
Your weekly rental price should make sense for how much the vehicle will actually be driven.