The 2005 Mercury Grand Marquis typically achieves around 16 miles per gallon (mpg) in the city and about 24 mpg on the highway. This results in an average combined fuel economy of approximately 19-20 mpg. However, actual mileage can vary based on driving conditions and maintenance.
According to the 2005 Mercury Grand Marquis Owner Guide : ( 19.0 US. gallons )
According to the 2004 Mercury Grand Marquis Owner Guide : ( 19.0 US. gallons )
The ( 2007 ) Mercury Grand Marquis has a ( 19 U.S. gallon tank )
According to the 1997 Mercury Grand Marquis Owner Guide : ( 20.0 U.S. gallons )
According to the 2000 Mercury Grand Marquis Owner Guide : ( The gas tank capacity is 19.0 U.S. gallons )
( 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
( 20 U.S. gallons ) according to my Chilton's book ( for a 1988 Mercury Grand Marquis )
A 2001 Mercury Grand Marquis will hold approximately 20 gallons of gasoline. The fuel economy is 17-25 miles per gallon.
According to the 2004 Mercury Grand Marquis Owner Guide : With engine oil filter change : ( 6.0 U.S. quarts of 5W-20 )
5
16 city 24 highway.