If you have the H6 engine, the manual recommends supreme (i.e. 91 octane or better); otherwise, regular gas works fine. (The H6 will run alright on regular, too, but you'll get a performance drop of roughly 4 to 5HP, and if you drive at a higher altitude, you'll notice the drop moreso than those living closer to sea level.)
The 2003 Subaru Outback is a gas-powered vehicle.
The gas tank on the 2003 Subaru Outback holds 16.9 gal..
This car has a 16.9 gallon gas tank
The 2001 Subaru Outback is a gas-powered vehicle.
The 2013 Subaru Outback is a gas-powered vehicle.
The 2008 Subaru Outback is a gas-powered vehicle.
The 2011 Subaru Outback is a gas-powered vehicle.
The 2006 Subaru Outback is a gas-powered vehicle.
The 2014 Subaru Outback is a gas-powered vehicle.
The 2009 Subaru Outback is a gas-powered vehicle.
The 2002 Subaru Outback is a gas-powered vehicle.
The 2012 Subaru Outback is a gas-powered vehicle.