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Flavor 987S · 02-27-2011, 04:00 AM

Once a year, or between 5,000-7,500 miles in the Boxster (Mobil 5W50). Once a year, or every 5,000 in the 993 Turbo (Mobil V-Twin 20W50). Blackstone Labs UOA's at every change.

02-27-2011, 04:00 AM	#5
Flavor 987S Registered User Join Date: Jul 2009 Location: Arlington Heights, IL Posts: 1,561	Once a year, or between 5,000-7,500 miles in the Boxster (Mobil 5W50). Once a year, or every 5,000 in the 993 Turbo (Mobil V-Twin 20W50). Blackstone Labs UOA's at every change.