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Well said, Jim.

Quote:

Originally Posted by MNBoxster

Hi,

Oil questions will always bring varying replies because there is a lot of Brand Loyalty out there generously promoted by the Oil Cos. themselves.

In a search for empirical truth, there is probably one Oil which is better than the others. But, these advantages are mostly unrealizable on a street car which changes it's oil every 7500 mi. or so.

As stated, any of these Oils, changed properly, will give as much benefit and protection as any of the others to within the nth degree. Cost therefore becomes a factor, because to pay more for advantages you cannot use means you're not really getting anything for your extra money.

But, people also have their favorites and derive the intangible of simply feeling better about having Brand X vs Brand Y and that's OK, choice makes America great.

Whatever, use any of the several Oils mentioned here (whatever your reasoning for choosing it), and you'll be OK.

Happy Motoring!... Jim'99

Paulv, thanks for posting the TSB, it's good to see what brands and weights Porsche recommends/approves.

Since Mobil 1 is readily available locally (walmart and probably all of the small auto parts stores), I'll be looking for some 0W40 or 5W40. I figure either will work, because it rarely gets below freezing here.

I believe I will also stick to a change interval of 7500-9000 miles, since I do make a lot of short trips including my daily commute. As I've always said, changing your oil more frequently CAN'T HURT.

Maybe sometime I will try Red Line, Royal Purple or Amsoil in my Boxster, and see if I can detect any tangible difference, but Mobil 1 served me well in my previous car, so it should be more that acceptible for my Boxster.