About 5.1 quarts (4.8 liters) of engine oil is required for a full oil change with a new filter, using synthetic 0W-20 oil.
Capacity details for the 2.5 L Forester
Knowing the exact capacity helps ensure you drain and refill the correct amount without under- or overfilling. The 2021 Forester's 2.5 L engine uses a typical capacity shown below when the filter is replaced.
Key figures to keep in mind before an oil change:
- Oil capacity with filter: 5.1 quarts (4.8 liters).
- Recommended oil: Synthetic 0W-20 (per Subaru specifications).
During the change, add the oil gradually, recheck with the dipstick, and stop near the full line after the engine sits for a moment.
Oil type and maintenance guidance
In addition to capacity, use the correct oil grade and follow Subaru's maintenance intervals. The 2.5 L engine is designed for 0W-20 synthetic oil, and the standard change interval is set by your driving conditions in the owner's manual.
Practical steps to ensure the oil change is done correctly:
- Warm up the engine, then park on a level surface and turn it off. Gather the oil, filter, and a drain pan.
- Drain old oil, replace the filter, and pour in 5.1 quarts (4.8 L) of new oil. Check for level with the dipstick.
- Start the engine, run for a minute, turn off, wait a few minutes, then recheck the level and top up if needed.
- Properly dispose of used oil and filter and reset maintenance reminders if applicable.
For precise guidance, consult your owner's manual or a Subaru service center, as oil capacity and recommended oil types can vary slightly by market or production batch.
Summary
The 2021 Forester 2.5 L engine takes approximately 5.1 quarts (4.8 liters) of engine oil when performing a full oil change with a new filter, with synthetic 0W-20 oil recommended by Subaru. Always refer to the owner's manual for your vehicle's exact specification and local service guidance.