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			I'd recommend every 5K. IF (and that is a big IF) the IMSB really does prefer new oil, then its cheap insurance. 
 I replace my oil every 6 track days which works out to about every 3 months/2,500 miles.
 
				__________________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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