2020 Subaru Forester Oil Capacity & Filter

The 2020 Subaru Forester takes 4.8 quarts (4.5 liters) of 0W-20 full synthetic oil.

Quick answer

• Oil Capacity: 4.8 quarts (4.5 liters) with filter change
• Recommended Oil Weight: 0W-20 Full Synthetic
• Oil Spec: API SN PLUS or higher, ILSAC GF-5 or higher
• OEM Oil Filter Part Number: 15208AA170 (or 15208AA160, check with dealer for latest)
• Aftermarket Oil Filter Cross-References:
  • Fram: PH6607
  • Wix: 57055
  • Mobil 1: M1-108A

Capacity by engine option

All 2020 Subaru Forester models come equipped with the same 2.5L direct-injection four-cylinder BOXER engine (FB25DI). Therefore, the oil capacity remains consistent across all trims.

Oil change interval

Subaru recommends the following oil change intervals for your 2020 Forester:

• Normal Driving Conditions: Every 6,000 miles or 6 months, whichever comes first.
• Severe Driving Conditions: Every 3,000 miles or 3 months, whichever comes first.

Severe driving conditions include situations like frequent short trips, driving in extremely hot or cold weather, heavy towing, dusty conditions, or extensive idling. Consult your owner's manual for a complete list of severe driving conditions applicable to your region.

Drain plug torque

The oil drain plug on your 2020 Subaru Forester should be torqued to 30 ft-lbs (40 Nm). Always use a new crush washer with every oil change to ensure a proper seal and prevent leaks. The OEM crush washer part number is 803916010.

How to change the oil

1. Warm up the engine to operating temperature, then shut it off.
2. Safely lift the vehicle and secure it on jack stands or a lift.
3. Place a drain pan under the oil pan.
4. Locate and remove the oil drain plug, allowing the old oil to drain completely.
5. Remove the old oil filter using an appropriate oil filter wrench.
6. Apply a thin coat of new oil to the gasket of the new oil filter.
7. Install the new oil filter and tighten it by hand until snug, then an additional 1/2 to 3/4 turn. Refer to the filter manufacturer's instructions for specific torque, if available.
8. Install the new crush washer on the drain plug and reinstall the drain plug. Torque to 30 ft-lbs (40 Nm).
9. Lower the vehicle.
10. Fill the engine with 4.5 quarts of fresh 0W-20 full synthetic oil through the oil filler cap.
11. Start the engine and let it run for a few minutes to circulate the new oil and check for leaks. Verify the oil pressure warning light turns off.
12. Shut off the engine, wait a few minutes for the oil to settle, then check the oil level on the dipstick. Add more oil if necessary, ensuring not to overfill.
13. Dispose of used oil and filter responsibly at a certified recycling center.

Common issues / tips

• Oil Consumption (Early Models): While generally less prevalent in the direct-injection FB25DI engine, some Forester owners (especially those with earlier FB-series engines) have reported minor oil consumption. Regularly checking your oil level between changes is a good practice.
• Subaru Oil Filters: Some enthusiasts prefer genuine Subaru oil filters due to their internal construction and bypass valve settings which are specifically designed for Subaru engines. While aftermarket filters for the specific part number are generally safe, sticking with OEM can provide peace of mind.
• Accessing the Filter: The oil filter on the 2020 Forester's FB25DI engine is conveniently located on top of the engine, making it easily accessible for removal and installation without needing to go under the vehicle.
• Crush Washer: Always replace the drain plug crush washer. Failing to do so is a common cause of oil leaks.
• Proper Disposal: Never pour used oil down the drain or into the trash. Most auto parts stores and service centers offer oil recycling.

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