That depends on exactly in what reguards your talking about, if you talking how much stuff you can stuff inside the car. Look at the plate under the door latch on the driverside door it should give you the total weight including people. If your talking about putting gear on the roof rack, normally they say not over 100lbs. If you talking about towing, that depends on your hitch, normally it has a label listing its limits.
The gas tank on the 2012 Subaru Outback holds 18.5 gal..
The gas tank on the 2008 Subaru Outback holds 16.9 gal..
The gas tank on the 2004 Subaru Outback holds 16.9 gal..
The gas tank on the 2003 Subaru Outback holds 16.9 gal..
The gas tank on the 2007 Subaru Outback holds 15.9 gal..
The gas tank on the 2013 Subaru Outback holds 18.5 gal..
The gas tank on the 2011 Subaru Outback holds 18.5 gal..
The gas tank on the 2014 Subaru Outback holds 18.5 gal..
The gas tank on the 2009 Subaru Outback holds 16.9 gal..
The gas tank on the 2002 Subaru Outback holds 16.9 gal..
The gas tank on the 2005 Subaru Outback holds 16.9 gal..
The gas tank on the 2006 Subaru Outback holds 16.9 gal..