According to the 2010 Mercury Grand Marquis Owner Guide :
With engine oil filter change :
( 6.0 U.S. quarts )
4.5 quarts
( 5 quarts ) with engine oil filter change ( according to the 1996 Mercury Grand Marquis Owner Guide )
According to the 2004 Mercury Grand Marquis Owner Guide : With engine oil filter change : ( 6 quarts )
( 5 quarts with filter change ) according to the 1999 Mercury Grand Marquis owners manual
( 6 quarts with engine oil filter change ) according to the 2003 Mercury Grand Marquis Owner Guide
For a 1995 Mercury Grand Marquis , 4.6 liter V8 : With engine oil filter change : ( 5.0 U.S. quarts of 5W-30 )
According to the 2004 Mercury Grand Marquis Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts of 5W-20 )
5
Five with filter change
( 6 quarts with filter change ) according to the owners manual
( 6 ) quarts with engine oil filter change - according to the owners manual
when i do my oil change i put 6