In Aus, people say: "Ooooo, it's too thin. 0W30..."
It's got a 3.5HtHs and a VI of >200
+the uber clean natural gas base stock
There is a reason it's in the sump of my sludge prone Saab 9-5 Turbo and getting over 30MPG!! (on the highway.) After 2 years since the first sump drop (was caked in 5mm of baked on hard coke/sludge and very glad I cleaned it when I did) I dropped it the other day and found no coking or build ups. just some residual carbon grit that had been encouraged loose from elsewhere in the engine. Sludge prone, definitely. But with rigorous maintenance and quality oil, it's like new. Pity the previous owner had to suffer so much (blown turbo because of sludge and grit in the oil...)
Regards
Jordan