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Old 10-11-2012, 01:58 PM   #13
Drives: 2010 Tiguan SE 4Motion
Join Date: Jul 2010
Location: Chicago, IL
Posts: 4,529
Originally Posted by maxtdi View Post
We can agree on that.

In theory though, an engine with less than 50k miles and recommended oil change intervals and correct oil shouldn't show any sludge, unless the sludge buildup is a flaw in itself.
Key words there are in theory. It's pretty widely accepted that the 10k oil change regimen isn't really enough. Plenty of people will use it, and not have any problems, but the sludge is a clear representation that the oil needs to be replaced more often.
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