FOR YEARS WITH OUT CHANGING THE OIL.CAUSE IT WAS A NEW COMPANY. BUT NOW WE CAN AFFORD GAS AND A FEW OIL CHANGES.BUT LETS NOT GET CARRIED AWAY ITS CHEAP GAS. THE CHEAP AUTOPARTS STORE RECYCLED OIL OUT OF THE RECYCLING CAN.BUT AT LEAST ITS NEW TO THE BUS :O) I HOPE TO DO ONE NEXT SUMMER IF THINGS WORK OUT HERE ON THE EBAY BUS CO.