Your BMW 325i was last produced in 2006 and features an in-line, six-cylinder engine. BMW recommends changing the oil and filter in this engine every 3,000 to 5,000 miles. This will require locating your oil filter, which is located in a different position than on most domestic engines.
The oil filter on your 325i is positioned at the front of your engine block. The filter is located directly between the fan and the valve cover, to the right of center and to the left of the air intake hose. You will see two cylindrical components with rounded caps, similar to the cap for a PVC pipe. The oil filter cap is the one on the left.
The actual oil filter on your 325i is held inside this filter housing or cap. To access the filter, remove the filter cap using a wrench. Once you remove the cap, slide the oil filter off the tube that extends from the cap housing.
BMW recommends using only high-performance, synthetic 10W40 or 10W30 oils in your 325i. When changing your oil filter, you will need 7 quarts of oil, as your 325i's engine capacity is 6.9 quarts.
