This is a sample from my first OCI on a recently acquired used 2002 Passat (150k miles) my daughter drives. The previous owner was pretty good about having the oil changed on schedule (VW specifies a 5,000 mile OCI), but he frequently used quickie lubes with whatever bulk dino oil was on hand. This oil was M1 5w-30, and he added an unspecified amount and type of make up oil over this interval. Previous owner estimated oil usage was 1 quart per 1,000 miles, which is how Blackstone assumed there were 5 quarts of make up oil added during this interval. My experience so far is no where near that (in almost 700 miles I have not seen the oil level change much at all). So I suspect the actual amount added was 1 or 2 quarts max.
There is light sludge and varnish visible in the oil fill hole, and that seemed consistent with the consumption problem reported by the previous owner. I asked Blackstone for guidance on gentle desludging, which led to the reply in the comments. I intend to run short OCIs with synthetic known for good detergency, and avoid additive flushes. I have M1 0w-40 in this car now, and I intend to use a VW 502.00 compliant oil going forward.
This car is in great shape for its age, was well maintained, has 4 wheel drive (4Motion), and is well rated for safety, so it's perfect for my daughter for now.
An autopsy of the filter used in this interval is here
There is light sludge and varnish visible in the oil fill hole, and that seemed consistent with the consumption problem reported by the previous owner. I asked Blackstone for guidance on gentle desludging, which led to the reply in the comments. I intend to run short OCIs with synthetic known for good detergency, and avoid additive flushes. I have M1 0w-40 in this car now, and I intend to use a VW 502.00 compliant oil going forward.
This car is in great shape for its age, was well maintained, has 4 wheel drive (4Motion), and is well rated for safety, so it's perfect for my daughter for now.
An autopsy of the filter used in this interval is here