In this video, we will be taking a look at a 2003 Saab 95 Linear(?) 2.0t. The issue we will be talking about here also applies to the 2.3t and 2.3Turbo engines. Basically the whole Trionic7 engine lineup.
High oil consumption on a turbocharged car is in many cases due to the oil seals on the turbocharger failing causing oil to enter either the exhaust housing (making a continues smoke show out the exhaust) or by entering the compressor side and collecting oil in the intercooler and boost/intake piping. This will usually cause thick blueish smoke from the exhaust while accelerating. This could also make the car misfire and run poorly.

A couple of days after recording this video, the car was back for a turbocharger replacement. The turbo was definitely defective as it had a damaged compressor wheel and lots of oil in the compressor housing.
Replaced the turbo with a known good unit, and the car is back and running strong.
Remember to replace oil and filter while doing a turbo replacement.
Use ONLY Saab specific oil. Either GMLLA025 or Dexos2 quality requirement. Saab recommends Mobil1, but you can use anything you like as long it fulfils the quality requirement mentioned above. 0w30, 0w40, 5w30, or 5w40 depending on mileage and climate. Replace oil every 10.000km/6000miles or every year whatever comes first. This is not a Saab recommendation but more of a general recommendation.