Mercury Grand Marquis
Maintenance specs for 3 variants of the Mercury Grand Marquis — from 1985 to 2011.
1985–1991 Mercury Grand Marquis
5.0L V8 (302) · RWD
150 hp / 270 lb-ft
Transmission
Type4-Speed Automatic (AOD)
FluidMercon ATF
Drain & fill3 qt
Full capacity12 qt
Power Steering
TypeRecirculating Ball
FluidFord Power Steering Fluid
Capacity16 oz
Differentials
Rear fluid80W-90 GL-5
Fuel
Tank20 gal
TypeRegular 87
Service Intervals
Oil change5,000 mi
Trans service30,000 mi
Coolant flush30,000 mi
Brake fluid30,000 mi
Spark plugs30,000 mi
Timingchain (no scheduled replacement)
Air filter30,000 mi
Drive belt60,000 mi
1992–1997 Mercury Grand Marquis
4.6L V8 (Modular) · RWD
190 hp / 265 lb-ft
Transmission
Type4-Speed Automatic (AOD-E/4R70W)
FluidMercon ATF
Drain & fill3 qt
Full capacity13.9 qt
Power Steering
TypeRecirculating Ball
FluidFord Power Steering Fluid
Capacity16 oz
Differentials
Rear fluid80W-90 GL-5
Fuel
Tank20 gal
TypeRegular 87
Service Intervals
Oil change5,000 mi
Trans service30,000 mi
Coolant flush30,000 mi
Brake fluid30,000 mi
Spark plugs30,000 mi
Timingchain (no scheduled replacement)
Air filter30,000 mi
Drive belt60,000 mi
1998–2011 Mercury Grand Marquis
4.6L V8 (Modular) · RWD
224 hp / 275 lb-ft
Transmission
Type4-Speed Automatic (4R75W)
FluidMercon V ATF
Drain & fill3 qt
Full capacity13.9 qt
Power Steering
TypeRecirculating Ball
FluidFord Power Steering Fluid (XT-2-QDX)
Capacity16 oz
Differentials
Rear fluid80W-90 GL-5 (Motorcraft XY-80W90-QL)
Fuel
Tank19 gal
TypeRegular 87
Service Intervals
Oil change7,500 mi
Trans service30,000 mi
Coolant flush30,000 mi
Brake fluid30,000 mi
Spark plugs100,000 mi
Timingchain (no scheduled replacement)
Air filter30,000 mi
Drive belt75,000 mi