1 million miles and '185 oil changes' means it had its oil changed around every 5,400 miles. He probably kept it 'topped up' too. The Americans go in for frequent oil changes, but most people don't need their engines to last so long. I'd be interest to know how much oil per 1000 miles it's now using.
When we traded in our old Passat, it was on over 240,000 miles with oil changes at 10-12,000 miles when it got to the minimum mark using the cheapest semi-synthetic I could find. IIRC it was eventually using about a litre every two thousand miles or so, still within VW's acceptable use of 1l/1000km.
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