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    Oil Rec. Please - 2013 Subaru STI - Harsh Driver

    1. What kind of vehicle you have 2013 Subaru STI 2.5liter boxer 4cyl, IHI VF48 turbo at 17.5lbs peak boost 2. What your owner's manual says -- not just viscosity, but certifications (look for acronyms like API SM, ILSAC GF-4, etc.) and change intervals as well 5w30 synthetic, API SM or SN...