Dealing with sudden excessive oil consumption at 130,000 miles. Had an oil change about 2,000 miles ago and oil sensor has been going off after 1,500-2,000 miles driven. Mechanic put 3 more quarts in and a week and a half later oil sensor is going off again indicating low oil. Mechanic confined this has been a frequent problem with this engine and insists piston rings are faulty & will eventually need engine replacement.