Based on data from 47 vehicles, 4,416 fuel-ups and 1,130,912 miles of driving, the 2004 Mercury Grand Marquis gets a combined Avg MPG of 18.45 with a 0.08 MPG margin of error.

Any Engine Type 4.6L V8 GAS (41) GAS (2) V8 GAS (3) Any Body Style Sedan (21) Any Submodel GS (12) LS (29) Other (6)

Below you can see a distribution of the fuel-ups with 198 outliers (4.29%) removed.

Following shows the average MPG of each of the 47 vehicles in the system.

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• 2004 Mercury Grand Marquis

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed
  Added Apr 2021 • 3 Fuel-ups

  Property of stereojunk

• 17.1 Avg MPG

• 2004 MERCURY

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Jul 2018 • 49 Fuel-ups

  Property of Dick2

• 17.1 Avg MPG

• Mercury Grand Marquis

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed
  Added Dec 2020 • 16 Fuel-ups

  Property of Mommy8

• 22.4 Avg MPG

• Intrepid

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Oct 2017 • 267 Fuel-ups

  Property of dwarfgh

• 19.0 Avg MPG

• Mercury Grand Marquis V2

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added Nov 2018 • 89 Fuel-ups

  Property of dbmotors

• 20.4 Avg MPG

• The Marquis

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added May 2020 • 27 Fuel-ups

  Property of RuneTheWusky

• 15.1 Avg MPG

• Mercury

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed
  Added Mar 2018 • 281 Fuel-ups

  Property of srimbey

• 19.4 Avg MPG

• Ravi Grand Marquis

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added May 2019 • 70 Fuel-ups

  Property of ravi2376

• 18.5 Avg MPG

• Merc

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed
  Added Jan 2018 • 114 Fuel-ups

  Property of Redhat18

• 18.9 Avg MPG

• The Beast

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Sep 2018 • 33 Fuel-ups

  Property of winscbk

• 19.6 Avg MPG

• Pimpmobile

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Oct 2019 • 19 Fuel-ups

  Property of JayK

• 16.6 Avg MPG

• My Grand Marquis

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added Apr 2019 • 73 Fuel-ups

  Property of lbaker_17

• 23.1 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

• C Grand Marquis

  2004 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Apr 2018 • 243 Fuel-ups

  Property of coderwolf

• 20.6 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

• Gramps

  2004 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed
  Added Mar 2018 • 256 Fuel-ups

  Property of ti_ming_le

• 19.4 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 LS 4.6L V8 GAS Automatic 4 Speed
  Added Jul 2019 • 18 Fuel-ups

  Property of rabatson

• 42.9 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

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