2017 Subaru Outback Fluid Type Specs

Quick reference

Engine Oil

For your 2017 Subaru Outback, the factory-recommended engine oil is a 0W-20 synthetic blend or full synthetic, meeting API (American Petroleum Institute) SN Plus or SP specifications and ILSAC (International Lubricant Specification Advisory Committee) GF-5 or GF-6 standards. The API SN Plus and SP specifications are particularly important as they address issues related to low-speed pre-ignition (LSPI) in turbocharged gasoline direct injection engines, though your naturally aspirated Outback will also benefit from the improved protection.

The capacity for the naturally aspirated 2.5L engine is approximately 5.1 US quarts (4.8 liters) when replacing the oil filter. Always verify the exact capacity in your owner's manual. It's crucial to use the correct viscosity and specification to ensure optimal engine performance, fuel economy, and longevity. Using an incorrect oil type can lead to increased wear, reduced fuel efficiency, and potentially engine damage.

Intervals: Subaru recommends engine oil and filter changes every 6,000 miles or 6 months, whichever comes first, under normal driving conditions. If you operate your vehicle under severe driving conditions (e.g., frequent short trips, extreme temperatures, dusty roads, towing), more frequent changes may be necessary.

Common Pitfalls: Never use a higher viscosity oil than recommended unless specifically advised by Subaru for very extreme operating conditions, as it can negatively impact fuel economy and cold start protection. Also, avoid conventional (non-synthetic) oils of the wrong viscosity, as they may not provide the same level of protection as the specified synthetic blend or full synthetic.

Engine Coolant

The 2017 Subaru Outback uses Subaru Super Coolant, which is a blue, phosphate-type Organic Acid Technology (OAT) coolant. This coolant is designed for extended life, providing superior corrosion protection for aluminum components common in modern engines. Its specific formulation is crucial for optimal cooling system performance and longevity.

Mixing different types of coolants (e.g., OAT with traditional IAT or HOAT coolants) can lead to chemical incompatibilities, gelling, reduced corrosion protection, and premature failure of cooling system components. Always use Subaru Super Coolant or an equivalent phosphate-type OAT coolant that meets Subaru's specifications.

Capacity: The cooling system capacity is approximately 7.6 US quarts (7.2 liters).

Intervals: Subaru Super Coolant is designed for very long service intervals, typically 137,500 miles or 11 years for the first change, and then every 75,000 miles or 6 years thereafter. However, it's always wise to regularly check the coolant level and condition.

Common Pitfalls: Never mix colors or types of coolant. If you are unsure of the coolant type, a full flush and refill with the correct Subaru Super Coolant is recommended. Do not use generic