For a 1987 Mercury Grand Marquis :
For the 5.0 liter / 302 cubic inch V8 engine
( 7.5 quarts of antifreeze with 7.5 quarts of preferably distilled water
should give you a 50 / 50 mix of engine coolant )
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For the 5.8 liter / 351 cubic inch ( 8.0 quarts of antifreeze )
According to the 2004 Mercury Grand Marquis Owner Guide : The engine cooling system capacity is ( 18 liters / 19 U.S. quarts ) It came from the factory with a 50 / 50 mix of antifreeze and distilled water
( 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
A 1999 Mercury Grand Marquis came from the factory with a 50 / 50 mix of distilled water and ( GREEN color antifreeze , meeting Ford specification ESE-M97B44-A )
According to the 1998 Mercury Grand Marquis Owner Guide : The engine cooling system capacity is ( 13.3 litres / 14.1 U.S. quarts ) So a 50 / 50 mix of distilled water and antifreeze would require : ( 6.65 litres / 7.05 U.S. quarts of distilled water and the same amount for the antifreeze )
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 the 2004 Mercury Grand Marquis Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts of 5W-20 )
( 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 )
5
Five with filter change