Subaru Forester, SK (USA / CAN)

Coolant capacity & service interval

Subaru Forester, SK (USA / CAN) requires coolant with a capacity range of 8,2 to 8,5 liters. Service intervals include checks at 30000 miles or 30 months, and changes at 75000 miles or 72 months and 137500 miles or 132 months. The data covers 10 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
Forester 2.5i (2024- )
  • Use: Normal
  • Capacity 8,2 liter
  • Check 30000 miles/ 30 months
  • Change 75000 miles/ 72 months
Forester 2.5i (2024- )
  • Use: First change only
  • Capacity 8,2 liter
  • Check 30000 miles/ 30 months
  • Change 137500 miles/ 132 months
Forester 2.5i (2023-2024)
  • Use: Normal
  • Capacity 8,5 liter
  • Check 30000 miles/ 30 months
  • Change 75000 miles/ 72 months
Forester 2.5i (2023-2024)
  • Use: First change only
  • Capacity 8,5 liter
  • Check 30000 miles/ 30 months
  • Change 137500 miles/ 132 months
Forester 2.5i Wilderness (2021-2024)
  • Use: Normal
  • Capacity 8,5 liter
  • Check 30000 miles/ 30 months
  • Change 75000 miles/ 72 months
Forester 2.5i Wilderness (2021-2024)
  • Use: First change only
  • Capacity 8,5 liter
  • Check 30000 miles/ 30 months
  • Change 137500 miles/ 132 months
Forester 2.5i (2019-2023)
  • Use: Normal
  • Capacity 8,5 liter
  • Check 30000 miles/ 30 months
  • Change 75000 miles/ 72 months
Forester 2.5i (2019-2023)
  • Use: First change only
  • Capacity 8,5 liter
  • Check 30000 miles/ 30 months
  • Change 137500 miles/ 132 months
Forester 2.5i (2018-2019)
  • Use: Normal
  • Capacity 8,5 liter
  • Check 30000 miles/ 30 months
  • Change 75000 miles/ 72 months
Forester 2.5i (2018-2019)
  • Use: First change only
  • Capacity 8,5 liter
  • Check 30000 miles/ 30 months
  • Change 137500 miles/ 132 months

Additional Notes

  • The Subaru Forester SK cooling system capacity is 8.5 liters across the 2.5i and 2.5i Wilderness configurations spanning 2018-2024, while the 2024 2.5i entry carries a slightly reduced capacity of 8.2 liters.
  • An 8.5-liter cooling system capacity is a relatively large fill volume for a four-cylinder crossover, reflecting the full system volume including the engine block, cylinder head passages, heater core circuit, and reservoir.
  • The 2024 2.5i specification at 8.2 liters represents a 0.3-liter reduction from the 8.5-liter figure shared by all other configurations in the same model range.
  • Under normal use conditions, the coolant change interval for all listed configurations is 75,000 miles or 72 months, whichever comes first.
  • A first change only interval of 137,500 miles or 132 months applies to all configurations, meaning the factory-fill coolant is formulated to last significantly longer before the first drain and refill compared to subsequent normal-interval changes.
  • The 132-month first-change interval equals 11 years, which is consistent with long-life coolant formulations such as OAT (Organic Acid Technology) types commonly used as factory fills in modern vehicles.
  • Coolant condition checks are scheduled at 30,000 miles or 30 months across all configurations, regardless of whether the normal or first-change-only interval applies to the actual fluid replacement.
  • The 2.5i Wilderness (2021-2024) shares identical capacity and interval specifications with the standard 2.5i configurations of the same period, with no differentiation in cooling system service data between the two trim lines.
  • The 2.5i configurations cover overlapping year ranges across multiple rows — 2018-2019, 2019-2023, 2023-2024, and 2024 — each carrying the same 8.5-liter capacity except the final 2024 entry, which shifts to 8.2 liters.

Other Systems