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

Automatic transmission fluid capacity & service interval

Subaru Legacy / Outback, BM, BR (USA / CAN) requires automatic transmission fluid with a capacity of 9.8 liters. Service intervals include checking at 30000 miles or 30 months and changing at 15000 miles or 15 months. The data covers 9 configurations.

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

TypeSpecifications
Legacy / Outback 3.6R (2012-2014)
  • Use: Normal
  • Capacity 9,8 liter
  • Code: E-5AT 5/1
Legacy / Outback 2.5 GT (+ Spec.B) (2010-2012)
  • Use: Normal
  • Capacity 9,8 liter
  • Check 30000 miles/ 30 months
  • Code: 5/1
Legacy / Outback 2.5 GT (+ Spec.B) (2010-2012)
  • Use: Severe
  • Capacity 9,8 liter
  • Change 15000 miles/ 15 months
  • Code: 5/1
Legacy / Outback 3.6R (2010-2012)
  • Use: Normal
  • Capacity 9,8 liter
  • Check 30000 miles/ 30 months
  • Code: 5/1
Legacy / Outback 3.6R (2010-2012)
  • Use: Severe
  • Capacity 9,8 liter
  • Change 15000 miles/ 15 months
  • Code: 5/1
Legacy / Outback 2.5 GT (+ Spec.B) (2009-2010)
  • Use: Normal
  • Capacity 9,8 liter
  • Check 30000 miles/ 30 months
  • Code: 5/1
Legacy / Outback 2.5 GT (+ Spec.B) (2009-2010)
  • Use: Severe
  • Capacity 9,8 liter
  • Change 15000 miles/ 15 months
  • Code: 5/1
Legacy / Outback 3.6R (2009-2010)
  • Use: Normal
  • Capacity 9,8 liter
  • Check 30000 miles/ 30 months
  • Code: 5/1
Legacy / Outback 3.6R (2009-2010)
  • Use: Severe
  • Capacity 9,8 liter
  • Change 15000 miles/ 15 months
  • Code: 5/1

Additional Notes

  • The automatic transaxle capacity across all listed Subaru Legacy / Outback BM/BR configurations — covering the 2.5 GT, 2.5 GT Spec.B, and 3.6R — is uniformly 9.8 liters, a figure consistent with a full overhaul or dry-fill volume rather than a partial service top-up.
  • For the 2.5 GT and 2.5 GT Spec.B in 2009-2010, the normal use condition specifies a fluid check at 30,000 miles or 30 months, whichever comes first, rather than a full fluid change.
  • Under severe use conditions for the 2009-2010 2.5 GT and 2.5 GT Spec.B, the interval shortens considerably to a fluid change at 15,000 miles or 15 months — half the distance and time of the normal-use check interval.
  • The 2010-2012 2.5 GT and 2.5 GT Spec.B carry the same 9.8-liter capacity and identical normal and severe use intervals as the 2009-2010 variant, indicating no change in transaxle specification across that model year overlap.
  • The 3.6R in 2009-2010 shares the same 9.8-liter capacity and the same interval structure — a 30,000-mile/30-month check under normal use and a 15,000-mile/15-month change under severe use — as the turbocharged 2.5 GT despite being a naturally aspirated six-cylinder engine.
  • The 3.6R in 2010-2012 retains the same capacity and both use-condition intervals as the 2009-2010 3.6R, again showing no variation in transaxle service requirements across that generation boundary.
  • For the 3.6R covering 2012-2014, the specifications list only the 9.8-liter capacity under a normal use condition, with no interval value recorded alongside it, distinguishing the entry from all earlier rows where an interval figure accompanies the capacity.

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