oil for a 1997 Boxster

[thstone]

I'm using Mobile 1 10W40 High Mileage. I read that it has a high concentration of wear protectors and high temp shear strength. And I can get it at any local autoparts store.

I am changing it at 5,000 miles or 6 months (which is about the same for me). Why? Because its not a big cost issue to me to change the oil more frequently ($200 per year vs $100 per year).

Also, my own personal vehicle ownership experience says that using a good oil and changing it frequently is always a winning strategy (e.g. my 1991 Nissan Pathfinder that I sold to my nephew with 225,000 miles is still running fine at 340,000).