Based on data from 70 vehicles, 4,782 fuel-ups and 1,374,366 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 (49) 5.3L V8 GAS (5) V6 GAS (15) Any Body Style Sedan (21) Any Submodel GTP (5) GXP (6) GT (21) Base (23) Other (15)

Below you can see a distribution of the fuel-ups with 134 outliers (2.73%) removed.

Following shows the average MPG of each of the 70 vehicles in the system.

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• My Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed
  Added Mar 2025 • 4 Fuel-ups

  Property of ryderbaum

• 18.7 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Nov 2024 • 26 Fuel-ups

  Property of Boutit

• 20.7 Avg MPG

• My Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed
  Added May 2024 • 32 Fuel-ups

  Property of Lavisa

• 20.4 Avg MPG

• 2005 Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 92 Fuel-ups

  Property of gkarels

• 24.5 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Mar 2018 • 473 Fuel-ups

  Property of zacharycunningham83

• 25.8 Avg MPG

• CompG

  2005 Pontiac Grand Prix GTP 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Sep 2018 • 266 Fuel-ups

  Property of prixxjohn21

• 19.3 Avg MPG

• Pontiac Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Jun 2021 • 9 Fuel-ups

  Property of derekjenny6

• 24.8 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

• My Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed
  Added Nov 2023 • 27 Fuel-ups

  Property of jackmcdaniel03

• 18.7 Avg MPG

• Maroon 5

  2005 Pontiac Grand Prix GTP 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Jun 2024 • 57 Fuel-ups

  Property of Deshanw1

• 22.1 Avg MPG

• My Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed
  Added Dec 2017 • 177 Fuel-ups

  Property of Colton1500

• 23.3 Avg MPG

• zz - 2005 Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed
  Added Aug 2021 • 39 Fuel-ups

  Property of amosjk

• 21.6 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Dec 2019 • 14 Fuel-ups

  Property of Magnaman03

• 22.0 Avg MPG

• Pontiac Grand Prix (N)

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Jan 2019 • 250 Fuel-ups

  Property of nmartens09

• 25.1 Avg MPG

• Grand Prix

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 267 Fuel-ups

  Property of binaryerr

• 21.5 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

• Dads Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Jun 2020 • 172 Fuel-ups

  Property of Fonzy1974

• 7.8 Avg MPG

• 2005 Pontiac Grand Prix GT

  2005 Pontiac Grand Prix GT 3.8L V6 GAS Automatic 4 Speed
  Added Mar 2017 • 403 Fuel-ups

  Property of jeradcroghan

• 23.3 Avg MPG

• Pontiac

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Mar 2021 • 21 Fuel-ups

  Property of Joey56397

• 23.3 Avg MPG

• Pontiac Grand Prix

  2005 Pontiac Grand Prix 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Aug 2019 • 41 Fuel-ups

  Property of Fawky

• 22.7 Avg MPG

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