36mm 3/8 drive Socket for removing Oil Filter Cartridge. The MINI oil filter canister is positioned on the back of the engine with very little clearance to the firewall. You need a very low profile socket like this one in order loosen and remove the filter cannister.
2002-2006 R50 MINI Cooper and R53 Cooper S Hardtop
2007-2008 R52 MINI Cooper and Cooper S Convertible
Filter change tips: Use this 36mm socket with a ratchet to remove the canister. It helps to 'loosen' the canister a bit when you drain the oil to help drain the filter (for less mess). Make sure you replace the o-ring with the new one supplied with the filter - apply a coat of fresh oil on the o-ring when you install it and tighten the filter housing to 18 ft. lbs.
Remember to use sythetic motor oil. MINI recommends 5W-40 or 5W-30 FULL SYNTHETIC motor oil.
Tighten the drain plug to 18 ft-lb. Start the engine and check for oil pressure. Don't forget to check for leaks too!
And darn it, dispose of the used oil and filter properly, please. And wipe that oil off the driveway before you track it into the house!
To reset the oil change interval in your MINI, see oil service reset.