I know there is Motul, M1 and Redline also but I suppose AMSOIL ASM has best HTHS (not at the lowest limit of 2,6 - my opinion), best Noack and highest TBN - so, I'll try to get AMSOIL first.
Some people are asking who makes Subaru branded oil...here is your answer : "In 2010, Subaru of America partnered with Idemitsu Lubricants America Corporation in Jeffersonville, IN to prepare Subaru-branded synthetic motor oil for applications in the new FB four-cylinder engine and in turbocharged engines. Researching and formulating Subaru engine-specific 0W-20 and 5W-30 synthetic motor oil ensures quality, performance, and ultimately, customer satisfaction." http://www.apolloamerica.com/index.htmhttp://en.m.wikipedia.org/wiki/Idemitsu_Kosan
