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 2004 Mercury Grand Marquis Owner Guide : With engine oil filter change : ( 6 quarts )
According to the 1997 Mercury Grand Marquis owners manual : With engine oil filter change : ( 5.0 quarts / 4.7 liters of engine oil )
5
According to the 2004 Mercury Grand Marquis Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts of 5W-20 )
6 quarts -------------------------------------------------------------------------------------------- The 2000 Mercury Grand Marquis Owner Guide shows : With engine oil filter change : ( 4.7 litres / 5.0 U.S. quarts )
According to my Chilton's Auto Repair Manual : For a 1991 Mercury Grand Marquis : Both the 5.0 liter / 302 and the 5.8 liter / 351 take : 4.0 U.S. quarts without filter 5.0 quarts with engine oil filter change
According to the 1996 Mercury Grand Marquis Owner Guide : With engine oil filter change : *( 5 quarts ) * engine oil dipstick is used to determine the fill amount
5 Qts. I suggest 10W-40
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 )