D4ATF in Outback p/s. Dumping half BMW g'box straight Redline MTL to change to MTL/D4ATF blend as straight MTL a tad thick for ACT winter. When your mechanic freaks out when replacing 60,000km old Redline g'box and diff oil thinking it's just been replaced in the Outback you know you are on to a good thing. Don't know about Amsoil Severe Gear but Redline oils are very good imo. POE basestock is hard to beat. My 2c FWIW