Based on data from 53 vehicles, 4,761 fuel-ups and 1,238,976 miles of driving, the 2004 Mercury Grand Marquis gets a combined Avg MPG of 18.51 with a 0.06 MPG margin of error.

Any Engine Type 4.6L V8 GAS (47) GAS (2) V8 GAS (3) Any Body Style Sedan (24) Any Submodel GS (15) LS (32) Other (6)

Below you can see a distribution of the fuel-ups with 637 outliers (11.80%) removed.

Following shows the average MPG of each of the 53 vehicles in the system.

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• Pimpmobile

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Oct 2019 • 26 Fuel-ups

  Property of JayK

• 17.0 Avg MPG

• Hefty

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added Oct 2017 • 393 Fuel-ups

  Property of computergeek737

• 18.1 Avg MPG

• My Grand Marquis

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added May 2020 • 8 Fuel-ups

  Property of tjx2003

• 13.2 Avg MPG

• Sedan

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Nov 2020 • 4 Fuel-ups

  Property of Dick2

• 17.3 Avg MPG

• Grand Marquis

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Nov 2018 • 24 Fuel-ups

  Property of Allenkb

• 25.7 Avg MPG

• My Grand Marquis

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed
  Added Nov 2017 • 39 Fuel-ups

  Property of hawkco

• 18.0 Avg MPG

• My Grand Marquis

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added Aug 2017 • 66 Fuel-ups

  Property of gocsefla

• 18.8 Avg MPG

• Veola

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Mar 2019 • 17 Fuel-ups

  Property of JWS1

• 20.3 Avg MPG

• Dad's Car

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Apr 2019 • 17 Fuel-ups

  Property of gripnick

• 22.3 Avg MPG

• My Grand Marquis

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added Feb 2019 • 17 Fuel-ups

  Property of jeff62

• 21.2 Avg MPG

• 2004 Mercury GM

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Apr 2018 • 35 Fuel-ups

  Property of neeleyb

• 20.2 Avg MPG

• My Grand Marquis

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added Aug 2018 • 3 Fuel-ups

  Property of Griswold35

• 14.7 Avg MPG

• Harold

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added Mar 2018 • 20 Fuel-ups

  Property of gracepm

• 12.9 Avg MPG

• Grand Marquis

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed
  Added Sep 2016 • 295 Fuel-ups

  Property of LarryB74

• 19.5 Avg MPG

• My Grand Marquis

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added Aug 2017 • 16 Fuel-ups

  Property of dan-kooy

• 16.7 Avg MPG

• My Grand Marquis

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added Nov 2015 • 202 Fuel-ups

  Property of Macedog79

• 19.8 Avg MPG

• The Boat

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Aug 2017 • 287 Fuel-ups

  Property of computergeek737

• 18.7 Avg MPG

• The Boat

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Oct 2017 • 287 Fuel-ups

  Property of computergeek737

• 18.7 Avg MPG

• The Boat

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Oct 2017 • 287 Fuel-ups

  Property of computergeek737

• 18.7 Avg MPG

• Ultimate

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Mar 2011 • 341 Fuel-ups

  Property of matlobi

• 18.4 Avg MPG

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