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Originally Posted by John V
Similar to my oil analysis after a 7.700 mile interval and mostly street driving. Except my iron was only 11ppm. Silicon was 19ppm. My next oil change was at 8k and had elevated levels of wear metals due to a lot of autocrossing, but not to extreme levels.
My new interval is 5,000 miles during autocross season and 8,000 miles otherwise. This is using 0W40 Mobil 1.
15,000 mile oil changes? Yeah right... if you want the motor to wear out in 100,000 miles.  |
I've reported this before so I'll give the short version. When Porsche tested the 996 turbo in the US, they drove it 100,000 miles in the LA area on 87 Octane gas and did not change the oil at all, just added it as needed. When the motor was torn down, it was still within new tolerances. This was presented as a tech session at a Porsche Parade.
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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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