Subaru Ascent, WM (USA / CAN)

Differential fluid capacity & service interval

Subaru Ascent, WM (USA / CAN) differential fluid capacity ranges from 0,8 to 1,2 liters. Service intervals include checking at 30000 miles or 30 months and changing at 15000 miles or 15 months. The data covers 12 configurations.

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

TypeSpecifications
  • Ascent 2.4 T AWD (2022- )
  • From CVT
  • Use: Normal
  • Capacity 1,2 liter
  • Check 30000 miles/ 30 months
  • Ascent 2.4 T AWD (2022- )
  • From CVT
  • Use: Severe
  • Capacity 1,2 liter
  • Check 30000 miles/ 30 months
  • Change 15000 miles/ 15 months
  • Ascent 2.4 T AWD (2022- )
  • Rear
  • Use: Normal
  • Capacity 0,8 liter
  • Check 30000 miles/ 30 months
  • Ascent 2.4 T AWD (2022- )
  • Rear
  • Use: Severe
  • Capacity 0,8 liter
  • Check 30000 miles/ 30 months
  • Change 15000 miles/ 15 months
  • Ascent 2.4 T AWD (2020-2022)
  • From CVT
  • Use: Normal
  • Capacity 1,2 liter
  • Check 30000 miles/ 30 months
  • Ascent 2.4 T AWD (2020-2022)
  • From CVT
  • Use: Severe
  • Capacity 1,2 liter
  • Check 30000 miles/ 30 months
  • Change 15000 miles/ 15 months
  • Ascent 2.4 T AWD (2020-2022)
  • Rear
  • Use: Normal
  • Capacity 0,8 liter
  • Check 30000 miles/ 30 months
  • Ascent 2.4 T AWD (2020-2022)
  • Rear
  • Use: Severe
  • Capacity 0,8 liter
  • Check 30000 miles/ 30 months
  • Change 15000 miles/ 15 months
  • Ascent 2.4 T AWD (2018-2020)
  • From CVT
  • Use: Normal
  • Capacity 1,2 liter
  • Check 30000 miles/ 30 months
  • Ascent 2.4 T AWD (2018-2020)
  • From CVT
  • Use: Severe
  • Capacity 1,2 liter
  • Check 30000 miles/ 30 months
  • Change 15000 miles/ 15 months
  • Ascent 2.4 T AWD (2018-2020)
  • Rear
  • Use: Normal
  • Capacity 0,8 liter
  • Check 30000 miles/ 30 months
  • Ascent 2.4 T AWD (2018-2020)
  • Rear
  • Use: Severe
  • Capacity 0,8 liter
  • Check 30000 miles/ 30 months
  • Change 15000 miles/ 15 months

Additional Notes

  • The Subaru Ascent 2.4 T AWD carries two separate differential fluid capacities: 1.2 liters for the front differential sourced from the CVT, and 0.8 liters for the rear differential. The difference in volume reflects the distinct housing sizes of each unit.
  • Across all three configuration groups (2018-2020, 2020-2022, and 2022 onward), the front differential from CVT holds 1.2 liters. No variation in that capacity figure appears between any of the model year groupings.
  • The rear differential capacity of 0.8 liters likewise remains unchanged across the 2018-2020, 2020-2022, and 2022 onward configurations, indicating a consistent rear differential unit throughout the covered model years.
  • Under normal use conditions, neither the front nor the rear differential specifies a fluid change interval. Only a check at 30,000 miles or 30 months is listed, meaning no scheduled drain and refill is called out for standard driving conditions.
  • Under severe use conditions, both the front differential from CVT and the rear differential share an identical change interval of 15,000 miles or 15 months. Severe use therefore halves the distance threshold relative to the check interval and introduces an active fluid replacement requirement absent from normal use.
  • The check interval of 30,000 miles or 30 months applies uniformly to both differentials, both use conditions, and all three model year groupings covered in the specifications. No configuration deviates from that inspection threshold.
  • Because the severe-use change interval of 15,000 miles or 15 months applies to both the front and rear differentials simultaneously, a severe-use service event would involve fluid replacement in both units at the same mileage or time trigger.

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