According to the 2003 Lincoln Navigator Owner Guide :
" premium " unleaded gasoline , 91 octane or higher
The 2003 Lincoln Navigator has double overhead cam (DOHC).
According to the 1998 Lincoln Navigator Owner Guide : ( " regular " unleaded , 87 octane gasoline is used )
You should typically pay between $400 and $600 to replace the compressor on a 2003 Lincoln Navigator. Where the repairs are completed and the type of compressor play a large part in the actual cost.
The 2010 Lincoln Navigator has single overhead cam (SOHC).
The 2001 Lincoln Navigator has double overhead cam (DOHC).
The 2014 Lincoln Navigator has single overhead cam (SOHC).
The 2011 Lincoln Navigator has single overhead cam (SOHC).
The 2007 Lincoln Navigator has single overhead cam (SOHC).
The 2012 Lincoln Navigator has single overhead cam (SOHC).
The 2009 Lincoln Navigator has single overhead cam (SOHC).
The 2006 Lincoln Navigator has single overhead cam (SOHC).
The 2008 Lincoln Navigator has single overhead cam (SOHC).