r-12 unless its been retrofitted
134 a
According to the 1997 Mercury Grand Marquis Owner Guide : ( 5W-30 ) is the PREFERRED oil
R134a
R134a
all newer vehicles take r134a refrigerant.
According to the 1996 Mercury Grand Marquis Owner Guide : ( 5W-30 is the PREFERRED engine oil weight )
According to the 1996 Mercury Grand Marquis owners manual ( 5W-30 engine oil ) is the PREFERRED oil weight
r134 a r134 a
R-134a
Disc, front and rear.
For a 1999 Mercury Grand Marquis : ( the engine air filter is Motorcraft FA-1668 )
According to the 1999 Mercury Grand Marquis Owner Guide ( and one of Ford's websites ) ( Motorcraft FL-820-S , engine oil filter )