One thing I think that is overlooked in these discussions is the fact that our cars hold twice as much oil as US cars that recommend 5000 to 7500 mile oil changes for normal service.
Our motors are smaller than V8s, run cleaner, and have twice as much oil, so the additives last longer.
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1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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