2011 Subaru Outback Owner's Manual - Page 454

& Fuel: GAS STATION REFERENCE & Fuel capacity: 18.5 US gal (70 liters, 15.4 Imp gal) ! Non-turbo models Use only unleaded gasoline with an octane rating of 87 AKI or higher. ! Turbo models Use premium unleaded gasoline with an octane rating of 93 AKI or higher. If 93 AKI fuel is not readily available in your area, refer to "Fuel requirements" F7-2. & Engine oil: 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" F11-16 . "Recommended grade and viscosity under severe driving conditions" F11-17 & 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" F7-2 section in this manual. & Engine oil capacity: 2.5 L models: 4.2 US qt (4.0 liters, 3.5 Imp qt) 3.6 L models: 6.7 US qt (6.3 liters, 5.5 Imp qt) & Cold tire pressure: Refer to "Tires" F12-5.