2004 Subaru Legacy Owner's Manual - Page 525

GAS STATION REFERENCE Fuel: 2.5 Liter models Use only unleaded gasoline with an octane rating of 87 AKI or higher. 3.0 Liter models Use premium unleaded gasoline with an octane rating of 91 AKI or higher. Regular unleaded gasoline with an octane rating of 87 AKI may be used if necessary. For optimum engine performance and driveability, it is recommended that you use premium grade unleaded gasoline. "Fuel" section in this manual. Fuel capacity: 16.9 US gal (64 liters, 14.1 Imp gal) Engine oil: Use only API classification SL with the words "ENERGY CONSERVING" and the New API certification mark (starburst mark) displayed on the container. 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 Engine oil capacity: 2.5 liter models: 4.2 US qt (4.0 liters, 3.5 Imp qt) 3.0 liter models: 5.6 US qt (5.3 liters, 4.6 Imp qt) Cold tire pressure: Tire size Wheel size Pressure Front Rear Rear at trailer towing Temporary Size spare tire Pressure P205/60R15 90H P205/55R16 89H 15 x 6JJ 32 psi (220 kPa, 2.2 kg/cm2) 30 psi (210 kPa, 2.1 kg/cm2) - T135/70R16 P225/60R16 97H 16 x 61/2JJ 30 psi (210 kPa, 2.1 kg/cm2) 29 psi (200 kPa, 2.0 kg/cm2) 32 psi (220 kPa, 2.2 kg/cm2) T145/80R16 60 psi (420 kPa, 4.2 kg/cm2)