You should use 10W 30 of any good quality oil.
On a 2002 Saab 9-5 it is by the oil pan.. Look under the front of the car and you should see it.
Go to saabnet.com. Answers there.
Always use synthetic.
10w30
It is a Saab 1.9tid vector sport
The SAAB will have an oil sump, specifically the oil pan collection for the engine oil and the fuel sump, the collection area for the fuel pump to pull from.
The engine oil capacity of a Saab 9-3 is 5 quarts. This includes a small amount of oil stored in the oil filter during replacement.
5w30 or 10w30
5w-40 fully synthetic
It's built on to the oil cap
It is Attached to the oil filler cap