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      01-29-2011, 08:53 PM   #39
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Originally Posted by ChrisK View Post
Based on the level of my gauge, what am I down? 1/2 quart?
From 1/8 to 1/2. That's the bad side of sensors; they're not very accurate. But very consistent when you know how they work. Use Bob's method described below.

Originally Posted by BobsM3Coupe View Post
Yes, but to be safe, put in a 1/4 quart first. Give it a few days of use, then check the level. If it still shows the midway point, then give it another 1/4 quart. That should bring it to the max level.
That's the way to do it . No need to wait 'a few days'; just 'reset' the sensor (car idling, level surface) when the engine has been running fully hot (temp needle in/near the middle) for about 10 miles, and it'd be fully repeatable.
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