Subaru Impreza Manuals 2011 Impreza Owner's Manual | Page 451

& Fuel: GAS STATION REFERENCE & Engine oil: Use only unleaded gasoline with an octane rating of 87 AKI or higher. & Fuel octane rating: This octane rating is the average of the Research Octane and Motor Octane numbers and is commonly referred to as the Anti Knock Index (AKI). Refer to “Fuel octane rating” F7-3. & Fuel capacity: 16.9 US gal (64 liters, 14.1 Imp gal) Use only the following oils. . ILSAC GF-4 or GF-5, which can be identified with the ILSAC certification mark (Starburst mark) . or API classification SN or SM with the words “ENERGY CONSERVING” For the complete viscosity requirements, refer to the following sections. . “Recommended grade and viscosity” F11-13 . “Recommended grade and viscosity under severe driving conditions” F11-14 & Engine oil capacity: 4.2 US qt (4.0 liters, 3.5 Imp qt) & Cold tire pressure: Refer to “Tires” F12-5.