My car goes in for an oil change and MOT early next month. I've been quoted £252 for the oil and oil filter change, plus cabin microfilter change ...... But £84.30 if I supply my own parts. - so a difference of £167 Has anyone any experience of doing this? Would I have to supply BMW branded parts and oil? Or can I supply Mahle filters who are the suppliers of the BMW OE ones, and Shell oil - who I believe supply BMW oil.