What ard said. Get a BMW filter kit (includes filler plug washer and filter cap gasket) and BMW synthetic oil at your dealer or through getbmwparts.com or Crown BMW. As for oil capacity, the M54 3.0 liter engine usually calls for 6.5 liters or 6.9 quarts. I would start with that and check the "gauge" in your i-Drive to see if you need to add any more in case the X5 uses a larger oil pan.

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