Subaru 2005 Legacy Owner's Manual page 445

Driving tips
and trailer are acceptable.
! Total trailer weight
Total trailer weight
The total trailer weight (trailer weight plus its cargo
load) must never exceed the maximum weight shown
below.
8-32
3,0-liter models
Conditions
When towing a trailer with-
out brakes.
When towing a trailer with
brakes.
When towing a trailer on a
long uphill grade continu-
ously for over 5 miles (8 km)
with an outside temperature
of 104°F (40°C) or above.
Maximum total trailer weight
1,000 lbs (453 kg)
3,000 lbs (1,360 kg)
1,500 lbs (680 kg)