The FJ Cruiser's gas tank capacity is 19.0 gallons.
http://www.fueleconomy.gov/feg/noframes/29754.shtml
20
The gas tank on the 2006 Toyota Land-Cruiser holds 25.4 gal..
The gas tank on the 2013 Toyota Land-Cruiser holds 24.6 gal..
The gas tank on the 2010 Toyota Land-Cruiser holds 24.6 gal..
The gas tank on the 2003 Toyota Land-Cruiser holds 25.4 gal..
The gas tank on the 2007 Toyota FJ-Cruiser holds 19 gal..
The gas tank on the 2010 Toyota FJ-Cruiser holds 19.0 gal..
The gas tank on the 2014 Toyota FJ-Cruiser holds 19.0 gal..
The gas tank on the 2013 Toyota FJ-Cruiser holds 19.0 gal..
The gas tank on the 2009 Toyota FJ-Cruiser holds 19.0 gal..
The gas tank on the 2012 Toyota FJ-Cruiser holds 19.0 gal..
The gas tank on the 2008 Toyota FJ-Cruiser holds 19.0 gal..