The oil inside your Pinion transmission should be replaced every 10,000 km (6,200 mi.) or at least once a year. With this kit you can easily change the oil at home using the directions in the owner's manual. The Pinion P8900 kit includes 60ml of fully synthetic Pinion transmission oil, good for one oil change service. Keep in mind the use of any other oil will void the factory Pinion warranty.