That's quite bad, in the last 30 years only ones I have seen with similar buildup are the ones that either had been severely overheated for prolonged period of time (100 miles without coolant ) or where the last record of oil change is 60 50k miles ago.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
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