Yes, U-Haul requires customers to return their rental trucks with the fuel tank at the same level it was when they picked it up. This policy helps to ensure that all customers have a consistent experience and are not charged additional fees. If you do not refill the tank before returning the truck, U-Haul will charge you for the fuel needed to fill it back to the original level, in addition to an extra service fee. Therefore, it is advisable to stop for fuel shortly before returning your rental truck, allowing you to avoid any unexpected charges. For specific instructions regarding fuel levels and any other return policies, you may want to check the current U-Haul website for additional information.