I have bought a SAAB 9-3 1.8i from 2004, and wen I checked the oil there was almost no oil in the car, so I decided to do a oil change, went and bought oil and oil filter got back home lifted the car got underneath the car and undid the drain bolt and to my surprise no oil came out of the car.
I then lowered the car and tried to unscrew the oil filter ( to no success the filter wouldn't move at all) I then went and added oil cause I thought there might not be oil at all in the car. I added about 1L of oil ( the oil capacity is 4.5 L ) and wen I checked the oil level it was FULL! Reseed the car back up undid the drain bolt. No oil. What might the problem be?