5qt's of oil if it is the 302 - 5.0L engine. With new oil filter. Steven in NC
4.5 quarts
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 )
( 5 quarts ) with engine oil filter change ( according to the 1996 Mercury Grand Marquis Owner Guide )
( 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
According to my Chilton's Auto Repair Manual : For a 1989 Mercury Grand Marquis : With engine oil filter change : ( 5 U.S. quarts ) * that applies to the 5.0 liter / 302 cubic inch V8 ( the 8th " character " of the VIN is an " F " ) , and the 5.8 liter / 351 cubic inch V8 ( the 8th " character " of the VIN is a " G " )