The gas tank on the 2013 Mazda MAZDA6 holds 18.5 gal..
The gas tank on the 2012 Mazda MAZDA6 holds 18.5 gal..
The gas tank on the 2006 Mazda MAZDA6 holds 18.0 gal..
The gas tank on the 2009 Mazda MAZDA6 holds 18.5 gal..
The gas tank on the 2015 Mazda MAZDA6 holds 16.4 gal..
The gas tank on the 2008 Mazda MAZDA6 holds 18.0 gal..
The gas tank on the 2007 Mazda MAZDA6 holds 18.0 gal..
The gas tank on the 2011 Mazda MAZDA6 holds 18.5 gal..
The gas tank on the 2005 Mazda MAZDA6 holds 18.0 gal..
The gas tank on the 2003 Mazda MAZDA6 holds 18 gal..
The gas tank on the 2004 Mazda MAZDA3 holds 14.5 gal..
15 gal.