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Originally Posted by mstmng
sorry for off-topic, but u take care of your car in proper way, so i wonder how often do you change engine oil and air/engine filters?
have you changed diff oil after break-in?
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No, diff fluid and transmission fluid are lifetime fluids. My friend who is a tech, said that lifetime fluids are usually good for 100,000 miles. So if I keep the M5 that long, I'll change my DCT and Diff fluid at 100,000 miles. U.S. Dealerships set oil change intervals to 12,000 miles on M5's now. I do an independent change in between at 6,000 miles. So every other oil change, the dealership does until the maintenance plan runs out.