The Eaton M45 Supercharger uses a 'lifetime' fluid for the front bearing and rear water pump gears. This oil is designed to last 100K miles, but any loss of fluid by leaks or other factors can lead to supercharger failure requiring replacement of the supercharger unit. There have been some reports of higher mileage Cooper S supercharger failing due to the loss of this fluid.
If you have access to your supercharger due to other work being done on your supercharger, CHECK THE FLUID LEVEL and top it off. If installing a new or rebuilt supercharger, you'll need TWO 4 OZ BOTTLES of this oil, 6.4 OZ total capacity.
NOTE: The Supercharger nose gear (pulley side) takes 4.9 oz. and the rear side water pump gear takes about 1.4 oz - as specified by Eaton. Basically, with the supercharger on the motor, you need to use a syringe to suction out all fluid and fill with new as specified. Tighten the reservoir plugs to 8 ft-lbs.
Fluid brand / label may vary depending on supply.
Compatible with 2002-2006 R53 MINI Cooper S and the 2005-2008 R52 Convertible MINI Cooper S
Supercharger Oil service information.
Domestic US, Ground Shipping only. No International Orders.