DIY maintenance - unpossible?

[Lux]

It is a common misconception that working on the Boxster engine is difficult. All you have to do is remove a few panels to get to the top, front and bottom of the engine. An added bonus is that you don't have the radiators sitting right in front of the engine like in most cars.

Here's a good FAQ if you're new to Boxsters.
http://www.986faq.com/default.asp

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[Brucelee]

As indicated, most of the maint stuff is doable, esp if you have access to a lift. Jack stands are a pain.

Re: leaks, plenty of RMS and some cam cover/valve cover leaks. Again, a pain to get to mostly.

Use a quality synthetic oil and change every 7500 miles IMHO.

Best of luck!