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Discussion Starter · #1 ·
Just took off the sump. 02 Aero SW, Auto, 90K. Bought the car at 74K. Did the PCV #6 upgrade soon thereafter. 0w-40 ever since.

I had PO records up till 50K. Mostly Saab maintenance with a couple of Chevron gas station stops for oil changes.

Found zero sludge and a minimal amount of varnish.
 

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