Mobil 10W-40 High Mileage changed every 10 hrs of track time (of course, those 10hrs are almost all at/near redline and wide open throttle!).
I figure that any good quality oil that is changed often will probably do the job just fine regardless of brand or exact weight.
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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