According to the 2009 Lincoln Navigator Owner Guide : The Navigator L has a ( 33.5 U.S. gallon gas tank )
The 2009 Lincoln Navigator has a 5.4 L base engine size.
The 2014 Lincoln Navigator has a 5.4 L base engine size.
The 2001 Lincoln Navigator has a 5.4 L base engine size.
The 2002 Lincoln Navigator has a 5.4 L base engine size.
The 2007 Lincoln Navigator has a 5.4 L base engine size.
The 2008 Lincoln Navigator has a 5.4 L base engine size.
The 2011 Lincoln Navigator has a 5.4 L base engine size.
The 2005 Lincoln Navigator has a 5.4 L base engine size.
The 2004 Lincoln Navigator has a 5.4 L base engine size.
The 2006 Lincoln Navigator has a 5.4 L base engine size.
The 2010 Lincoln Navigator has a 5.4 L base engine size.