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 Aviator Owner Guide ( 5W-20 )
The 2005 Lincoln Navigator runs on premium unleaded (required).
Use 5W30
5w30
Use any major brand 5W20 oil.
According to the 2002 Lincoln Navigator Owner Guide : ( 5W-20 engine oil is recommended )
A/C oil filter and 5W30 Oil.
You use 10W-30 from any good oil brand.
5w30
5w 30
owners manual says to use 5w 30 motor oil