Sticking with 0W-20 synthetic oil that meets the API SP/ILSAC GF-6 standards is the single best action an owner can take for the engine. For the 2017 model year, the oil must satisfy the Subaru-specific specification known as "ILSAC GF-6" or the equivalent "API SP" rating.
2017 Outback Engine Oil Protection Level: Why 0W-20 Synthetic Is Essential
Common Mistakes to Avoid Enthusiasts transitioning from other brands or older vehicles might assume that higher viscosity equals better protection. 4 quarts with the filter change.
Always ensure the oil filter meets Subaru’s specifications for flow rate and dirt-holding capacity. The boxer engine operates at high speeds and temperatures, and synthetic formulations provide superior protection and performance consistency.
2017 Outback Engine Oil Protection Level: Why 0W-20 Synthetic Is Essential
Even under severe conditions, the 0W-20 viscosity remains the correct choice to ensure the engine receives adequate lubrication without sacrificing efficiency. Using 5W-30 or 10W-30 can cause oil starvation in the top end of the engine, leading to increased friction and potential damage over time.
More About 2017 Subaru outback oil type
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