Buy this to fit after first oil change, replaces oil tank plug, so tank has to be empty. Also buy one of the hose adapters, straight or 90 degree. I use the 90 degree adapter with a long hose, drain oil right into a jug :
http://www.oildrainvalve.net/ez-oil-drain-valve-ez-107-12mm-1-75/

thumbs cheers

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2013 M3W # 793
'Mosquito'