Most car rental companies offer two policies to choose from when renting a vehicle. The first is a full-to-empty option. You'll receive the car with a full tank of gas and return it empty, the car company will then charge you for a full tank. Please note that they'll generally charge a premium fee for refuelling. Your best option is a fair fuel policy. The company supplies the car with a full tank and you return it with a full tank. Remember to refuel in the city as most gas stations closer to the airport tend to charge more. Search car hire on KAYAK