Subaru Ascent, WM (USA / CAN)

Coolant capacity & service interval

Subaru Ascent WM (USA / CAN) coolant capacity is 11,1 liters. Service intervals include 75000 miles/ 72 months and 137500 miles/ 132 months. The data covers 6 configurations.

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

TypeSpecifications
Ascent 2.4 T AWD (2022- )
  • Use: Normal
  • Capacity 11,1 liter
  • Change 75000 miles/ 72 months
Ascent 2.4 T AWD (2022- )
  • Use: First change only
  • Capacity 11,1 liter
  • Change 137500 miles/ 132 months
Ascent 2.4 T AWD (2020-2022)
  • Use: Normal
  • Capacity 11,1 liter
  • Change 75000 miles/ 72 months
Ascent 2.4 T AWD (2020-2022)
  • Use: First change only
  • Capacity 11,1 liter
  • Change 137500 miles/ 132 months
Ascent 2.4 T AWD (2018-2020)
  • Use: Normal
  • Capacity 11,1 liter
  • Change 75000 miles/ 72 months
Ascent 2.4 T AWD (2018-2020)
  • Use: First change only
  • Capacity 11,1 liter
  • Change 137500 miles/ 132 months

Additional Notes

  • The Subaru Ascent 2.4 T AWD cooling system holds 11.1 liters across all listed configurations, a capacity consistent with a turbocharged four-cylinder engine paired with a full AWD drivetrain, where additional cooling circuit volume is common.
  • Under normal use conditions, the coolant change interval is set at 75,000 miles or 72 months, whichever comes first, applying uniformly across the 2018-2020, 2020-2022, and 2022- configurations.
  • A separate "first change only" interval of 137,500 miles or 132 months is specified alongside the normal interval for all three configurations. A first-change-only interval reflects a factory-fill coolant formulation designed to last longer before the initial service, after which the standard interval applies.
  • The 132-month first-change interval equals 11 years, meaning the factory coolant fill in earlier model years such as 2018 would reach the time-based threshold before the mileage threshold for many typical usage patterns.
  • The 11.1-liter capacity figure represents a service fill, meaning the volume required when refilling the cooling system through normal service procedures rather than a complete overhaul or block flush, which would typically require a higher total volume.
  • The capacity and both interval values remain identical across the 2018-2020, 2020-2022, and 2022- configurations, indicating no specification change was introduced across those production periods for the 2.4 T AWD cooling system.

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