SAE 5w20 any major brand conventional or synthetic oil.
According to the 2004 Mercury Grand Marquis Owner Guide : ( " regular " unleaded gasoline , 87 octane )
Take it to a repair shop.
headlight relay location on a 2004 mercury grand marquis
According to the 2004 Mercury Grand Marquis Owner Guide : ( 19.0 US. gallons )
2004 mercury grand marquis fan stop working
It is inside the fuel tank, removal will require access to the top of the fuel tank.
On a 2004 Mercury Grand Marquis : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
According to the 2004 Mercury Grand Marquis Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts of 5W-20 )
The cabin air filter, in your 2004 Mercury grand Marquis, is located behind the dashboard on the passenger side. The air filter is directly behind the glove compartment.
According to the 2004 Mercury Grand Marquis Owner Guide : With engine oil filter change : ( 6 quarts )
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
Should be 4x6. 3x5 is the other size.