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#9: 02-21-2013, 08:45 AM
Title: Junior Member
Location: Dixie
Car: 2011 Subaru/2002 Audi TT Quattro
Posts: 71
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I've been an Amsoil dealer and mechanical engineer for thirty years and I can tell you that Royal Purple is a reputable company. Their industrial lubricants - particularly their compressor oils and gear lubricants - are highly regarded. It's certainly possibly to get good results with their engine oils in Subaru turbos if you choose the correct oil for this application. The 10w-40/HPS I cited above should work very well, given its physical and chemical properties.