It is not much information available about that, but it looks like Saab is cooperating with a Swedish Company based in Gothenburg called Clean Oil Technology.
COT has developed some technologies to keep the oil in the engine cleaner. While the oil is clean, it can be further used, and thus the intervals between oil changes could be increased.
In the 2010 review of the company, there is a small paragraph about their cooperation with Saab.
Saab Automobile now has funding in place for the continued operation of the COT which meant we could advertise the cooperation that lasted a long time. Saab Automobile AB is planning to further strengthen its position in the fields of environmental technology and safety. Among the interesting new environmental technologies being studied is the COT Oil Refiner ™. Our study and evaluation of the COT Oil Refiner ™ by field tests have been ongoing during 2010 and most of 2009. The results, which so far we have achieved, meet our expectations, “said Kjell ac Bergstrom, CEO of Saab Automobile Powertrain AB. He continues: “COT Oil Refiner ™ provides us with potential opportunities in the future to extend our service intervals, in our evaluation of the system also includes planning for the introduction of selected models to emerge.” Together with Saab, which has a recognized reputation as innovators and a pioneer in cutting-edge technology in the automotive industry, we have now reached the result that opens a whole new international market for the COT Oil Refiner™.
If this is true, Saab has been working on that for at least 2 Years, but without assigned funding, the Trolls seem to be good at that.
With this technology Saab intends to increase the oil change intervals, which, in my point of view, would make Saab cars very interesting.