Oil commonly leaks from the distributor o-ring requiring replacement of the o-ring. Oil will be visible on the front of the engine near the distributor.Google+
Car Problem Reports
Saab 900 Oil Leaks From the Distributor O-Ring
Saab 900 Problem
Engines Affected: 2.0L 4 Cylinder Turbo, 2.3L 4 Cylinder
Visitor, 1993 Saab 900, 2.0L 4 Cylinder Turbo, 97,000 mi
Oil leaks from distributer O-ring area then burns on plate above turbo.