What causes smoke on 95 Saab 9000cse?

Smoke from a 1995 Saab 9000 CSE can be caused by several factors, including worn piston rings, valve seals, or gaskets, which may lead to oil entering the combustion chamber. Additionally, a malfunctioning turbocharger can also contribute to excessive oil consumption and smoke. If the smoke is blue, it typically indicates burning oil, while white smoke may suggest coolant leakage, and black smoke often points to an overly rich fuel mixture. It's important to diagnose the specific cause to address the issue effectively.