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Old Thu, Mar-16-2017, 07:06:44 PM   #8
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Default Re: Full 9qt oil change in the M3 still Says Add 1 More Quart

How much exactly have you driven the car since you changed the oil? If you have put a few hundred miles on it, then I think you are getting an accurate reading and should add oil. If not, then I am not so sure. If you are worried, add a quart, but I would not worry about driving 1 quart low on a 9 quart system unless I was on a racetrack. In the worst case, you can always drain some back out if you get an overfull reading. I have had the overfull reading after being in your situation and continuing to add oil.
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