The full-to-full policy requires you to pick up the vehicle with a full tank and return it with a full tank. Make sure the tank is completely full before driving off. If you return the car without refilling the tank, the rental company will fill it up and typically charge a significant service fee.
The standard minimum rental duration is 1 day for standard vehicles and 2 days for luxury vehicles and minivans. Rental companies typically offer a 59-minute grace period before additional hours or days are billed.