Based on data from 26 vehicles, 1,209 fuel-ups and 336,552 miles of driving, the 2005 Mercury Grand Marquis gets a combined Avg MPG of 19.77 with a 0.21 MPG margin of error.

Any Engine Type 4.6L V8 GAS (26) Any Body Style Sedan (11) Any Submodel Limited Edition (1) Ultimate Edition (5) LS (9) GS (11)

Below you can see a distribution of the fuel-ups with 25 outliers (2.03%) removed.

Following shows the average MPG of each of the 26 vehicles in the system.

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• My Grand Marquis

  2005 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added Nov 2024 • 7 Fuel-ups

  Property of vic98

• 17.9 Avg MPG

• My Grand Marquis

  2005 Mercury Grand Marquis Ultimate Edition 4.6L V8 GAS Automatic 4 Speed
  Added Apr 2023 • 53 Fuel-ups

  Property of Jamiesullivan

• 21.6 Avg MPG

• MGM

  2005 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Jun 2021 • 123 Fuel-ups

  Property of sodopesofresh

• 18.1 Avg MPG

• Black Panther

  2005 Mercury Grand Marquis GS 4.6L V8 GAS
  Added Jul 2020 • 207 Fuel-ups

  Property of Leivas

• 21.5 Avg MPG

• Wellington

  2005 Mercury Grand Marquis Ultimate Edition 4.6L V8 GAS Automatic 4 Speed
  Added Sep 2024 • 15 Fuel-ups

  Property of pestertom

• 22.1 Avg MPG

• My Grand Marquis

  2005 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed
  Added May 2020 • 31 Fuel-ups

  Property of kc8swy

• 17.4 Avg MPG

• 2005 Mercury Grand Marquis LS Premium

  2005 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed
  Added Apr 2024 • 13 Fuel-ups

  Property of rhurl5522

• 23.3 Avg MPG

• Grandpa's Car

  2005 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Dec 2017 • 37 Fuel-ups

  Property of Jay2TheRescue

• 19.8 Avg MPG

• Mercury

  2005 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Nov 2021 • 65 Fuel-ups

  Property of Stve1005

• 23.4 Avg MPG

• My Grand Marquis

  2005 Mercury Grand Marquis Limited Edition 4.6L V8 GAS Automatic 4 Speed
  Added Dec 2020 • 46 Fuel-ups

  Property of aplusrepair

• 15.7 Avg MPG

• Grandma Rquis

  2005 Mercury Grand Marquis Ultimate Edition 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Sep 2021 • 5 Fuel-ups

  Property of jonprager

• 21.4 Avg MPG

• My Grand Marquis

  2005 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed
  Added Apr 2021 • 16 Fuel-ups

  Property of doublell

• 17.3 Avg MPG

• Mercury

  2005 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Oct 2019 • 99 Fuel-ups

  Property of FMCreporting

• 23.2 Avg MPG

• Yacht

  2005 Mercury Grand Marquis Ultimate Edition 4.6L V8 GAS Automatic 4 Speed Sedan
  Added May 2019 • 39 Fuel-ups

  Property of 127Lucas

• 18.9 Avg MPG

• My Grand Marquis

  2005 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed
  Added May 2020 • 3 Fuel-ups

  Property of ianmon

• 37.6 Avg MPG

• My Grand Marquis

  2005 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed
  Added Sep 2017 • 91 Fuel-ups

  Property of SJWeez

• 19.8 Avg MPG

• white whale

  2005 Mercury Grand Marquis GS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Jan 2009 • 148 Fuel-ups

  Property of Daddyo

• 19.2 Avg MPG

• Mercury

  2005 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Aug 2021 • 9 Fuel-ups

  Property of pepepilot

• 18.7 Avg MPG

• White Grand Marquis

  2005 Mercury Grand Marquis Ultimate Edition 4.6L V8 GAS Automatic 4 Speed
  Added Nov 2017 • 8 Fuel-ups

  Property of yarr

• 20.0 Avg MPG

• Grand Marquis

  2005 Mercury Grand Marquis LS 4.6L V8 GAS Automatic 4 Speed Sedan
  Added Apr 2018 • 29 Fuel-ups

  Property of hyoomendriver

• 16.1 Avg MPG

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