Subaru Outback Manuals 2015 Outback Owner's Manual | Page 577

& Fuel: GAS STATION REFERENCE & Engine oil capacity: Use only unleaded gasoline with an octane rating of 87 AKI (90 RON) or higher. 2.5 L models: 5.1 US qt (4.8 liters, 4.2 Imp qt) 3.6 L models: 6.9 US qt (6.5 liters, 5.7 Imp qt) & 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” F7-3. The indicated oil quantity is only a guideline and is estimated based on a case when the engine oil is changed with an oil filter. After refilling the engine with oil, the oil level should be checked using an oil level gauge. For more details about maintenance and service, refer to “Engine oil” F11-11. & Fuel capacity: & Cold tire pressure: 18.5 US gal (70 liters, 15.4 Imp gal) & Engine oil: Always use the SUBARU approved engine oil. For further details, please contact your SUBARU dealer. If the approved engine oil is unavailable, use the alternative engine oil described as follows. . API classification SM with the words “ENERGY CONSER- VING” or SN with the words “RESOURCE CONSERVING” . or ILSAC GF-4 or GF-5, which can be identified with the ILSAC certification mark (Starburst mark) For the complete viscosity requirements, refer to “Engine oil” F12-4. Refer to “Tires” F12-9.