19.0 Gallon gas tank
18.5
Maximum capacity is 15.3 gallons.
According to the 2010 Mercury Mariner Owner Guide : ( the fuel tank holds 17.5 U.S. gallons )
The gas tank on the 2010 Toyota Matrix holds 13.2 gal..
The gas tank on the 2010 Audi A4 holds 16.9 gal..
The gas tank on the 2010 Nissan Maxima holds 20.0 gal..
The gas tank on the 2010 Acura TL holds 18.5 gal..
The gas tank on the 2010 Nissan Pathfinder holds 21.1 gal..
The gas tank on the 2010 Kia Rio holds 11.9 gal..
The gas tank on the 2010 Honda Insight holds 10.6 gal..
The gas tank on the 2010 Dodge Challenger holds 18.0 gal..