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mnc-i · 08-19-2013, 06:54 AM

I have never had to add oil to my 1999 Boxster.

I purchased it in Sep 2009, with 104,000 miles.

I change the oil & filter every 10,000 miles.

I started off using Mobil 1 10W40 and for the last few changes I have used Mobil 1 15W50.

I now have 194,000 miles.

MNC-I

08-19-2013, 06:54 AM	#24
mnc-i Registered User Join Date: May 2010 Location: Austin, Texas Posts: 183	I have never had to add oil to my 1999 Boxster. I purchased it in Sep 2009, with 104,000 miles. I change the oil & filter every 10,000 miles. I started off using Mobil 1 10W40 and for the last few changes I have used Mobil 1 15W50. I now have 194,000 miles. MNC-I