According to the 2002 Lincoln Navigator Owner Guide :
( 5W-20 engine oil is recommended )
According to the 2006 Lincoln Navigator owners manual ( 5W-20 )
It's the center by the oil pan by the driver side
5W-30 ( according to the 1998 Lincoln Navigator Owner Guide )
According to the 2002 Lincoln Navigator Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts of 5W-20 engine oil )
According to the 2000 Lincoln Navigator Owner Guide ( 5W-30 )
According to the 2000 Lincoln Navigator Owner Guide ( 5W-30 ) * with engine oil filter change , 5.7 litres / 6.0 U.S. quarts of 5W-30 engine oil
According to the 2005 Lincoln Navigator Owner Guide : With engine oil filter change : ( 7.0 U.S. quarts / 6.6 liters of 5W-20 )
According to the 2005 Lincoln Navigator Owner Guide ( 5W-20 ) * with engine oil filter change , 7.0 U.S. quarts / 6.6 litres of 5W-20 engine oil
It depends on what model year of Lincoln Navigator According to the various Owner Guides Up to the 2001 model year ( 5W-30 ) 2002 and newer ( 5W-20 )
According to the 2006 Lincoln Navigator Owner Guide ( 5W-20 )
According to the 2008 Lincoln Navigator Owner Guide : With engine oil filter change : ( 7.0 quarts of engine oil )
According to the 1999 Lincoln Navigator Owner Guide ( 5W-30 )