Subaru Legacy / Outback, BM, BR (USA / CAN)

Manual transmission fluid capacity & service interval

Subaru Legacy / Outback, BM, BR (USA / CAN) requires manual transmission fluid with a capacity range of 3,3 to 3,7 liters. Service intervals include checking every 30000 miles or 30 months and changing every 15000 miles or 15 months. The data covers 6 configurations.

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

TypeSpecifications
Legacy / Outback 2.5i (2013-2014)
  • Use: Normal
  • Capacity 3,3 liter
  • Code: 6/1
Legacy / Outback 2.5i (2012-2013)
  • Use: Normal
  • Capacity 3,3 liter
  • Code: 6/1
Legacy / Outback 2.5i (2010-2012)
  • Use: Normal
  • Capacity 3,7 liter
  • Check 30000 miles/ 30 months
  • Code: 6/1
Legacy / Outback 2.5i (2010-2012)
  • Use: Severe
  • Capacity 3,7 liter
  • Change 15000 miles/ 15 months
  • Code: 6/1
Legacy / Outback 2.5i (2009-2010)
  • Use: Normal
  • Capacity 3,7 liter
  • Check 30000 miles/ 30 months
  • Code: 6/1
Legacy / Outback 2.5i (2009-2010)
  • Use: Severe
  • Capacity 3,7 liter
  • Change 15000 miles/ 15 months
  • Code: 6/1

Additional Notes

  • The Subaru Legacy / Outback BM/BR 2.5i manual transaxle holds 3.7 liters of fluid for model years 2009-2012, while the 2012-2014 model years carry a reduced capacity of 3.3 liters, representing a measurable difference of 0.4 liters between the two specification groups.
  • A 3.7-liter fill volume is a relatively substantial capacity for a manual transaxle, reflecting the integrated nature of the gearbox and differential in an all-wheel-drive layout where a single fluid sump serves multiple functions.
  • The 3.3-liter capacity listed for the 2012-2014 2.5i manual transaxle carries no associated service interval, meaning only the fill volume is specified for those model years.
  • Under normal use conditions for the 2009-2012 2.5i, the service specification calls for a fluid check at 30,000 miles or 30 months, rather than a full fluid change, indicating a monitoring-based approach rather than a scheduled replacement under standard driving conditions.
  • Under severe use conditions for the 2009-2012 2.5i, the interval shifts to a fluid change at 15,000 miles or 15 months, which is half the distance and time of the normal-use check interval, reflecting the increased thermal and mechanical stress associated with severe operating conditions.
  • The 2009-2010 and 2010-2012 specification rows share identical capacity and interval values, with both groups listing 3.7 liters, a 30,000-mile or 30-month check under normal use, and a 15,000-mile or 15-month change under severe use.
  • The overlap at the 2010 model year, appearing in both the 2009-2010 and 2010-2012 specification groups, indicates that 2010 falls within a shared specification window rather than a distinct transitional year with unique values.
  • The severe-use interval of 15,000 miles or 15 months applies exclusively to the 2009-2012 2.5i configurations; no equivalent severe-use interval is listed for the 2012-2014 model years.

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