Subaru Legacy / Outback, BN, BS (USA / CAN)

Manual transmission fluid capacity & service interval

Subaru Legacy / Outback, BN, BS (USA / CAN) requires manual transmission fluid with a capacity of 3,3 liters. Service intervals include checks every 30000 miles or 30 months and changes every 15000 miles or 15 months. The data covers 4 configurations.

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

TypeSpecifications
Legacy / Outback 2.5i (2015-2017)
  • Use: Normal
  • Capacity 3,3 liter
  • Check 30000 miles/ 30 months
  • Code: 6/1
Legacy / Outback 2.5i (2015-2017)
  • Use: Severe
  • Capacity 3,3 liter
  • Change 15000 miles/ 15 months
  • Code: 6/1
Legacy / Outback 2.5i (2014-2015)
  • Use: Normal
  • Capacity 3,3 liter
  • Check 30000 miles/ 30 months
  • Code: 6/1
Legacy / Outback 2.5i (2014-2015)
  • Use: Severe
  • Capacity 3,3 liter
  • Change 15000 miles/ 15 months
  • Code: 6/1

Additional Notes

  • The manual transaxle fluid capacity across all listed Legacy / Outback 2.5i configurations from 2014-2017 is 3.3 liters, which represents a service fill volume typical of a transaxle unit combining transmission and differential functions in a single housing.
  • Under normal use conditions, the 2014-2015 Subaru Legacy / Outback 2.5i manual transaxle calls for a fluid check interval of 30,000 miles or 30 months, rather than a full fluid change.
  • Under severe use conditions, the 2014-2015 2.5i manual transaxle specifies a fluid change at 15,000 miles or 15 months, cutting the service interval in half compared to the normal-use check schedule.
  • The 2015-2017 2.5i manual transaxle carries the same 30,000-mile or 30-month check interval under normal use as the 2014-2015 configuration, with the 3.3-liter capacity unchanged across both year groupings.
  • For the 2015-2017 2.5i under severe use, the fluid change interval remains at 15,000 miles or 15 months, consistent with the earlier 2014-2015 severe-use specification.
  • The distinction between a fluid check under normal use and a fluid change under severe use is notable. A check interval implies inspection and top-off as needed, while a change interval requires full fluid replacement on the defined schedule.

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