I would like to tell about my experiences with z max. I have soaked all the bearings inside my trans for my x factory car. The difference in the drag of the trans is unbelievable. I pulled all the seals out of the bearings and soaked everything in rubbing alcohol. then placed the dry bearing in z max for about 30 hours. I am now in the process of soaking all the internal gears, spur and pinions and the rest of the cars bearings. If it makes the difference it did with the trans I cant wait to see what it does with the rest of the car.