Based on data from 66 vehicles, 4,628 fuel-ups and 1,336,787 miles of driving, the 2005 Pontiac Grand Prix gets a combined Avg MPG of 21.92 with a 0.14 MPG margin of error.

Any Engine Type 3.8L V6 GAS (45) 5.3L V8 GAS (5) V6 GAS (15) Any Body Style Sedan (19) Any Submodel GTP (4) GXP (6) GT (19) Base (22) Other (15)

Below you can see a distribution of the fuel-ups with 134 outliers (2.81%) removed.

Following shows the average MPG of each of the 66 vehicles in the system.

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• My Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed
  Added Jun 2016 • 5 Fuel-ups

  Property of uncledan

• 23.2 Avg MPG

• Pontiac GP

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Dec 2015 • 29 Fuel-ups

  Property of adamburling

• 17.3 Avg MPG

• My Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed
  Added Jul 2015 • 42 Fuel-ups

  Property of SpencerMielke

• 21.4 Avg MPG

• Z - Pontiac GXP

  2005 Pontiac Grand Prix GXP 5.3L V8 GAS Automatic 4 Speed Sedan
  Added Oct 2017 • 234 Fuel-ups

  Property of BeeBeep

• 18.8 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Oct 2017 • 6 Fuel-ups

  Property of cjtyle2

• 24.2 Avg MPG

• Cool Grandpa

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Sedan (4 Door)
  Added Apr 2015 • 11 Fuel-ups

  Property of Dewie

• 27.5 Avg MPG

• Pontiac Grand Prix GT

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed
  Added Oct 2016 • 11 Fuel-ups

  Property of lenny_lexus

• 20.9 Avg MPG

• My Grand Prix

  2005 Pontiac Grand Prix GXP 3.8L GAS V6 Automatic 4 Sedan (4 Door)
  Added Oct 2014 • 21 Fuel-ups

  Property of curtie99

• 17.5 Avg MPG

• My Grand Prix

  2005 Pontiac Grand Prix GTP 3.8L GAS V6 Automatic 4 Sedan (4 Door)
  Added Oct 2014 • 4 Fuel-ups

  Property of trdmike

• 17.5 Avg MPG

• Boosted Grocery-Getter

  2005 Pontiac Grand Prix GAS V6
  Added Feb 2013 • 48 Fuel-ups

  Property of Diskant

• 18.9 Avg MPG

• Jodi's car

  2005 Pontiac Grand Prix GAS V6
  Added May 2014 • 8 Fuel-ups

  Property of jozeemom

• 24.1 Avg MPG

• 05 Grand Prix

  2005 Pontiac Grand Prix 3.8L GAS V6 Automatic 4 Sedan (4 Door)
  Added Jul 2014 • 4 Fuel-ups

  Property of Omni628

• 23.8 Avg MPG

• 2005 Grand Prix GTP

  2005 Pontiac Grand Prix GAS V6
  Added Jan 2014 • 462 Fuel-ups

  Property of jjacobson

• 21.2 Avg MPG

• Orange Grand Prix

  2005 Pontiac Grand Prix GAS V6
  Added Nov 2010 • 59 Fuel-ups

  Property of lauraq414

• 25.0 Avg MPG

• REZBOMB

  2005 Pontiac Grand Prix GAS V6
  Added Apr 2013 • 31 Fuel-ups

  Property of ironblock6

• 25.5 Avg MPG

• 05 grand Prix

  2005 Pontiac Grand Prix GAS V6
  Added Apr 2010 • 68 Fuel-ups

  Property of 02proxsdude

• 25.1 Avg MPG

• grand prix gtp

  2005 Pontiac Grand Prix GAS V6
  Added Mar 2012 • 3 Fuel-ups

  Property of bucky119

• 20.1 Avg MPG

• 05 GTP

  2005 Pontiac Grand Prix GAS V6
  Added Jul 2012 • 6 Fuel-ups

  Property of kylesorg

• 25.3 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix GAS V6
  Added May 2011 • 20 Fuel-ups

  Property of gmoose

• 22.6 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix GAS V6
  Added Sep 2009 • 14 Fuel-ups

  Property of Mattyuwgb

• 25.4 Avg MPG

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