Subaru WRX & WRX STI Manuals 2010 Impreza WRX & WRX STI Owner’s Manual | Page 332

11-12 Maintenance and service & Recommended grade and viscosity capabilities Oil grade: ILSAC GF-4, which can be identified with the ILSAC Certification Mark (Starburst Mark) or API classification SM with the words “ENERGY CONSERVING” These recommended oil grades can be identified by looking for either or both of the following marks displayed on the oil container. ILSAC Certificati