According to the 1997 Mercury Grand Marquis Owner Guide : ( 5W-30 ) is the PREFERRED oil
A 1992 Mercury Grand Marquis came from the factory with ( 5W-30 )
According to the 1996 Mercury Grand Marquis owners manual ( 5W-30 engine oil ) is the PREFERRED oil weight
According to the 1996 Mercury Grand Marquis Owner Guide ( 5W-30 is the PREFERRED engine oil )
According to the 1996 Mercury Grand Marquis Owner Guide : ( 5W-30 is the PREFERRED engine oil weight )
( 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 )
According to the 2010 Mercury Grand Marquis Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts )
According to the 1997 Mercury Grand Marquis owners manual : With engine oil filter change : ( 5.0 quarts / 4.7 liters of engine oil )
No
It is important to have the right types of fluids in a car for it to run smoothly. A Grand Marquis will use engine oil 5w-20 or 5w-30.
( 6 quarts with engine oil filter change ) according to the 2003 Mercury Grand Marquis Owner Guide