Quote:
Originally Posted by tom mulqueen
I just bought a 2005 Carrera 997 with 3.8L engine. It has 67,000 miles and runs great. I have the service records and it has always run Mobil 1 full synthetic. I want to use the "best oil"and change it every 3000 miles or so. What is the best oil to run in these engines? How about additives?
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IMHO changing the oil every 3000 miles (unless it has been 12 months prior) is a waste of time, money, oil, etc.
I track my car, and ran it with ~250 miles of tracking @ 125 to 145MPH, most of it at 90 to 100°+, and ~750 street miles . Sent in my oil samples (engine, trans, and differential) to Blackstone for an analysis. The results basically said that running all the fluids twice as long before the next oil/filter change would be fine.
Contact Blackstone for a kit, send in your oil samples and let the results guide you to what you think is best.
+1. Stay away from additives and only use approved oil.