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Message: <blockquote data-quote="Schwepps" data-source="post: 461433" data-attributes="member: 3592">Price is a good determinant of whether an oil is a G-III or G-IV. You get what you pay for, and G-IV feedstock is expensive stuff. But seriously, only a very minute percentage of vehicles in the world use G-IV, and G-III is certainly good enough especially if you change it at 10-12k intervals.Incidently, I don't know where Syntium PAO feedstock comes from, but my pure guess would be that it's actually Shell feedstock from their plant in Europe (Belgium?)Yes AB, LL-04 was introduced in 2004 to meet European diesel emission standards and the spec actually says "not to be used outside Europe". It may be slightly less protective than LL-01 which was introduced in 2001 and IMO, is the best one to use.</blockquote>