My 2008 E320 Bluetec is going to need a oil change and the old oil is black with that look of overdue oil.
I was thinking to make one change using regular oil and use it for the maximum of 1K miles just to clean the engine from that old black oil and then make a second oil change whit the engine already clean. For the second oil change I would use synthetic the oil as recommended by Mercedes Benz.
Should I do or not do it?
Thanks

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Nyck - TX - USA