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1. What type and viscosity should I be using. Temps range here from 15 to 60 in the winter to as hi as 90 deg in the summer.

2. Are oil changes a DIY?

3. Good place to get filters?

4. Any good resources for DIY jobs on the 996tt?

5. How often should I change the oil and how much should I expect to be burning?
TIA

 

1. 0w40 is the default weight, but others have said 5w40 is good as well. Don't quote me on that second part.

2. Yes. Below:

3. It's a simple drop-in filter. You can get it from Porsche. Refer to the diagrams below.

4. http://www.renntech.org/forums/index.php?showforum=103 (you will need to register)

5. Some people change every 3-5k, some change every 10k. Some change once year. I think Porsche recommends 10 or 15k (once again, don't quote me on the Porsche recommended time, but I think that is correct).

You should be burning, once broken in, about 1 qt every 1000-1400 miles on average. The harder you drive, the more you will burn.

Parts you will need:
1 ea 996 107 225 52 (or 996 107 225 53) Oil Filter (with large O-ring)
1 ea 999 707 465 40 Small O-ring
1 ea 900 123 010 20 Copper Sealing Ring - Oil Tank
1 ea 900 123 118 30 Aluminum Sealing Ring - Engine
9 ea 996 106 665 55 Mobil 1 0W-40 or equal (approx. 8.5 liters (MY04 GT3 9.0 liters))
Approved Oils as of June 2004
The list is now very long (for worldwide coverage). Here is a short list of popular oils (US/Canada):

Castrol Syntec 5W-50 5W-50 ncp G
Castrol Syntec 5W-40 5W-40 ncp GL
Mobil 1 0W-40 ncp GL (factory fill)
Mobil 1 5W-40 ncp GL
Mobil 1 5W-50 ncp GL
Mobil 1 Tri-Synthetic Formula 0W-40 ncp GL
Texaco Havoline Synthetic 5W-40 ncp GL

Note: ncp oils are synthetic (or "non-conventional processing") oils. GL oils have good light running properties because of their light low-temperature viscosity as well as a high level of temperature stability. G rated oils can be used as non-seasonal oil, but do not have the same light running properties as "GL" oils.
Tools you will need:
Tire ramps or jack
15 mm socket for crankcase drain
27 mm wrench and 19 mm socket for oil tank drain
Oil filter wrench (p/n 000 721 920 40) (tool 9204 about $7 to $22 at your dealer) image
9 plus quart oil catch pan
Torque wrench (optional)

Oil should be changed when the engine has reached normal operating temperature. CAUTION - oil will be hot, take adequate precautions to avoid being burned. Always dispose of the waste oil in accordance with local legal requirements.

1. Use ramps or jack up the vehicle at the points provided.
2. Remove the oil drain screw and collect the engine oil in a disposal container (at least 9 quarts).
3. Wait about 20 minutes for the old oil to drain. Then clean the oil drain screw and screw it back in with a new aluminium sealing ring. Tightening torque is 52 ft-lb.
   
4. Remove the oil tank drain screw (19 mm) while holding the nut above it with another (27 mm) wrench (this avoids twisting the tank itself). Collect the engine oil in a disposal container. Wait about 20 minutes for the old oil to drain. Then clean the oil tank drain screw and screw it back in with a new sealing ring. Tightening torque is 44 ft-lb.
   
5. Remove the oil filter using the oil filter wrench. Pull off and dispose of the old oil filter element.
   
6. Clean the oil filter housing thoroughly inside and outside and replace the two O-rings. The new O-rings will go on easier if a light amount of oil is on them. Do not put them on with a screwdriver or other sharp object as a sharp object will damage the O-ring.
   
7. Remove the remaining quantity of oil from the oil filter housing by suction.
8. Install the new filter element.
9. Lightly apply oil to the housing threads. Install oil filter housing and tighten to 19 ft-lb.
10. Fill with engine oil. The oil change quantity is approx. 8.5 liters (MY04 GT3 9.0 liters) after a draining time of approx. 20 minutes.
    

 

Thank you very much!