How much coolant does a Mercury Grand Marquis hold?

The Mercury Grand Marquis cooling system holds 6-10 quarts total depending on the engine. A drain-and-fill replaces about 50-60% of the coolant. For a complete flush, you'll need the full capacity amount.

What type of transmission fluid does a Mercury Grand Marquis use?

The Mercury Grand Marquis transmission fluid type depends on whether it's an automatic or manual transmission and the model year. Automatic transmissions typically use ATF WS, Dexron VI, or manufacturer-specific fluid. Manual transmissions use 75W-90 gear oil.

Does a Mercury Grand Marquis have power steering fluid?

2015+ Mercury Grand Marquis models with electric power steering don't use power steering fluid. Older models with hydraulic power steering use ATF or manufacturer-specific fluid — check your owner's manual.

What brake fluid does a Mercury Grand Marquis use?

Most Mercury Grand Marquis models use DOT 3 or DOT 4 brake fluid. DOT 4 has a higher boiling point and is preferred for performance driving. Never use DOT 5 (silicone-based) in a system designed for DOT 3/4.

🧪Fluid Capacities

Mercury Grand Marquis Fluid Capacities

All fluid capacities for your Mercury Grand Marquis: engine oil, coolant, transmission fluid, brake fluid, power steering, and more.

Quick Answer

The Mercury Grand Marquis requires multiple fluids maintained at specific levels. Engine oil, coolant, transmission fluid, brake fluid, and power steering fluid all have different capacities depending on your engine and model year.

2006-2011

Engine Oil4.0 - 6.5 quarts (varies by engine)

Coolant (total system)6.0 - 10.0 quarts

Transmission Fluid3.5 - 4.0 quarts (drain & fill) / 7-9 quarts (total)

Brake FluidDOT 3 or DOT 4 — ~1 quart for full flush

Power Steering FluidATF or manufacturer-specific — ~1 quart

Windshield Washer~1 gallon

Notes

→Never mix different types of coolant — flush completely when changing brands
→Transmission fluid should be checked with the engine running and at operating temperature
→Brake fluid absorbs moisture over time — replace every 2-3 years regardless of mileage

Shop on Amazon →Full Repair Guide →

2000-2005

Engine Oil4.0 - 6.5 quarts (varies by engine)

Coolant (total system)6.0 - 10.0 quarts

Transmission Fluid3.0 - 4.0 quarts (drain & fill)

Brake FluidDOT 3 or DOT 4 — ~1 quart for full flush

Power Steering FluidATF or manufacturer-specific — ~1 quart

Windshield Washer~1 gallon

Notes

→Never mix different types of coolant — flush completely when changing brands
→Transmission fluid should be checked with the engine running and at operating temperature
→Brake fluid absorbs moisture over time — replace every 2-3 years regardless of mileage

Shop on Amazon →Full Repair Guide →

1994-1999

Engine Oil4.0 - 6.5 quarts (varies by engine)

Coolant (total system)6.0 - 10.0 quarts

Transmission Fluid3.0 - 4.0 quarts (drain & fill)

Brake FluidDOT 3 or DOT 4 — ~1 quart for full flush

Power Steering FluidATF or manufacturer-specific — ~1 quart

Windshield Washer~1 gallon

Notes

→Never mix different types of coolant — flush completely when changing brands
→Transmission fluid should be checked with the engine running and at operating temperature
→Brake fluid absorbs moisture over time — replace every 2-3 years regardless of mileage

Shop on Amazon →Full Repair Guide →

1988-1993

Engine Oil4.0 - 6.5 quarts (varies by engine)

Coolant (total system)6.0 - 10.0 quarts

Transmission Fluid3.0 - 4.0 quarts (drain & fill)

Brake FluidDOT 3 or DOT 4 — ~1 quart for full flush

Power Steering FluidATF or manufacturer-specific — ~1 quart

Windshield Washer~1 gallon

Notes

→Never mix different types of coolant — flush completely when changing brands
→Transmission fluid should be checked with the engine running and at operating temperature
→Brake fluid absorbs moisture over time — replace every 2-3 years regardless of mileage

Shop on Amazon →Full Repair Guide →

1983-1987

Engine Oil4.0 - 6.5 quarts (varies by engine)

Coolant (total system)6.0 - 10.0 quarts

Transmission Fluid3.0 - 4.0 quarts (drain & fill)

Brake FluidDOT 3 or DOT 4 — ~1 quart for full flush

Power Steering FluidATF or manufacturer-specific — ~1 quart

Windshield Washer~1 gallon

Notes

→Never mix different types of coolant — flush completely when changing brands
→Transmission fluid should be checked with the engine running and at operating temperature
→Brake fluid absorbs moisture over time — replace every 2-3 years regardless of mileage

Shop on Amazon →Full Repair Guide →

Frequently Asked Questions

How much coolant does a Mercury Grand Marquis hold?: The Mercury Grand Marquis cooling system holds 6-10 quarts total depending on the engine. A drain-and-fill replaces about 50-60% of the coolant. For a complete flush, you'll need the full capacity amount.
What type of transmission fluid does a Mercury Grand Marquis use?: The Mercury Grand Marquis transmission fluid type depends on whether it's an automatic or manual transmission and the model year. Automatic transmissions typically use ATF WS, Dexron VI, or manufacturer-specific fluid. Manual transmissions use 75W-90 gear oil.
Does a Mercury Grand Marquis have power steering fluid?: 2015+ Mercury Grand Marquis models with electric power steering don't use power steering fluid. Older models with hydraulic power steering use ATF or manufacturer-specific fluid — check your owner's manual.
What brake fluid does a Mercury Grand Marquis use?: Most Mercury Grand Marquis models use DOT 3 or DOT 4 brake fluid. DOT 4 has a higher boiling point and is preferred for performance driving. Never use DOT 5 (silicone-based) in a system designed for DOT 3/4.

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