I have ~107,000 miles on my 2000 Boxster S, I bought it about 4,700 miles ago. it had an oil change as part of the LN IMS bearing at that time and I haven't had to add any. It currently has Mobile One 0W40, I am getting ready to do my first oil change at 5,000 with Castrol Edge with Syntec 5W40 (or whatever the new name of the formula is)

Steve

85k on a 98, I check often but haven't needed add oil since last change at almost 4500 miles ago.
My digital oil meter in the car isn't the most accurate though, giving me a different reading at almost ever start, it's a good thing i am lucky to an old fashioned dipstick.

126,000 miles on a '99 engine. I never add oil between changes but I change the oil 5x a year because of all of the track duty so maybe it just never gets a chance to go down.

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