Based on data from 66 vehicles, 4,880 fuel-ups and 1,420,819 miles of driving, the 2005 Pontiac Grand Prix gets a combined Avg MPG of 21.73 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 189 outliers (3.73%) removed.

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

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• Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 242 Fuel-ups

  Property of binaryerr

• 21.6 Avg MPG

• Pontiac Grand Prix (N)

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Jan 2019 • 206 Fuel-ups

  Property of nmartens09

• 25.5 Avg MPG

• Dads Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Jun 2020 • 168 Fuel-ups

  Property of Fonzy1974

• 7.7 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Mar 2018 • 308 Fuel-ups

  Property of zacharycunningham83

• 26.0 Avg MPG

• My Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed
  Added Dec 2017 • 113 Fuel-ups

  Property of Colton1500

• 23.3 Avg MPG

• Pontiac Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Aug 2019 • 35 Fuel-ups

  Property of Fawky

• 22.9 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Sep 2020 • 7 Fuel-ups

  Property of Mh400ltd

• 19.3 Avg MPG

• 2005 Pontiac Grand Prix GT

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed
  Added Mar 2017 • 397 Fuel-ups

  Property of jeradcroghan

• 23.4 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Dec 2019 • 6 Fuel-ups

  Property of Magnaman03

• 20.9 Avg MPG

• Grand Prix GXP

  2005 Pontiac Grand Prix GXP 5.3L V8 GAS Automatic 4 Speed
  Added Sep 2016 • 553 Fuel-ups

  Property of msteiner17

• 20.3 Avg MPG

• CompG

  2005 Pontiac Grand Prix GTP 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Sep 2018 • 218 Fuel-ups

  Property of prixxjohn21

• 19.8 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 467 Fuel-ups

  Property of mfowler730

• 24.0 Avg MPG

• 2005 Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 23 Fuel-ups

  Property of gkarels

• 28.0 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed Sedan
  Added May 2016 • 130 Fuel-ups

  Property of silliwidej

• 23.2 Avg MPG

• My Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed
  Added Aug 2019 • 7 Fuel-ups

  Property of isugrad99

• 21.6 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Dec 2020 • 148 Fuel-ups

  Property of bigsmitty111

• 17.9 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Dec 2020 • 148 Fuel-ups

  Property of bigsmitty111

• 17.9 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Oct 2017 • 148 Fuel-ups

  Property of bigsmitty111

• 17.9 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Oct 2019 • 148 Fuel-ups

  Property of bigsmitty111

• 17.9 Avg MPG

• My Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed
  Added May 2019 • 5 Fuel-ups

  Property of ParkerEisy

• 24.2 Avg MPG

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