Quote:
Originally Posted by jakeru
My fairly new (to me) 2001 base with >100k on the clock recently got its first oil change. At only 7500 miles, which was half of the manufacturer recommended change interval,
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The Porsche oil change interval was updated years ago. IIRC, it's now 10,000 miles. Not the old 15,000 miles. So, 1/2 the interval should now be 5,000 miles, which is the oil change interval I use.
And I've run high zinc & phosphorus olis (Mobil V-Twin 20W50) in my old 993 Turbo for many-many miles......over 40,000 miles with zero issues to the cats. Most "high" ZDDP oils today are still BELOW the ZDDP levels of oils from years ago before our gubbermint got involved. Bottom line, cats are cheap compared to engines. Most of the high quality Porsche engine builders have a boneyard full of good, fully functional cats laying around.......they far outnumber the dead motors.