care questions & need advice on 911S 06

Tire life depends on the tires, the driving conditions, and if you keep them inflated properly. As to oil changes, read the manual... Even if someone replies with the answer here, read the manual. Then I'd recommend finding a 997 owners site and finding how-to's for anything else you want to do/be able to do yourself. Pelicanparts is a good place to start looking for forums and also where you can get maintenance items. If you still need help find local members of PCA (Hell I'd recommend joining PCA). I've never had a chance to work on the newer Porsches, just drove 'em. Some of the dry sump systems have multiple drain points for oil changes, so it's important for you to find a good how-to before you attempt this on your own. A lot of shops don't know how to deal with these either so IMO it's best to take it to a shop that specializes in Porsches or take it to a dealer if you don't want to do it yourself.

not sure I'd put anything but 93 octaine in the car. Tires probably only last 15k miles, oil change should be at 10k miles (only put synthetic 0w-40 in the car, tires are VERY expensive - be warned. They are fun cars to drive but not cheap to maintain.

Michelin Pilot Super Sports will last up to 30K on the back (my current 997) which wears tires fast. The older PS2's only lasted 12K on my 996. These are not cheap tires but they have low noise and great performance. Oil change frequency in the manual for a 2006 is 20,000 miles. I don't go over 15 and often change at 10K. It's an expensive service since there are 9+ quarts of Mobile 1 synthetic. I use a local shop for non warranty work. He charges me $200. The dealer wants $450. for the extra they check all the stuff the manual says to and vacuum the grill area. Pretty easy work to self perform than pay $200 per hour for someone else to do. Read your manual but I believe you just add an air cleaner change at 40K and spark plugs at 60K.