Based on data from 19 vehicles, 1,377 fuel-ups and 390,500 miles of driving, the 2003 Pontiac Bonneville gets a combined Avg MPG of 21.64 with a 0.21 MPG margin of error.

Any Engine Type 3.8L V6 GAS (16) V6 GAS (3) Any Body Style Sedan (5) Any Submodel SLE (4) SSEi (5) SE (7) Other (3)

Below you can see a distribution of the fuel-ups with 80 outliers (5.49%) removed.

Following shows the average MPG of each of the 19 vehicles in the system.

• Betty the Bonneville

  2003 Pontiac Bonneville SLE 3.8L V6 GAS Automatic 4 Speed
  Added Jan 2021 • 281 Fuel-ups

  Property of tabpat

• 23.4 Avg MPG

• Bonneville

  2003 Pontiac Bonneville SE 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Oct 2017 • 186 Fuel-ups

  Property of Rayoltman

• 24.4 Avg MPG

• Penelope

  2003 Pontiac Bonneville SLE 3.8L V6 GAS Automatic 4 Speed
  Added Sep 2015 • 178 Fuel-ups

  Property of CarGuyCarl

• 19.6 Avg MPG

• Pontiac

  2003 Pontiac Bonneville SE 3.8L V6 GAS Automatic 4 Speed
  Added Mar 2017 • 123 Fuel-ups

  Property of danewills

• 20.2 Avg MPG

• 2003 Bonneville

  2003 Pontiac Bonneville SE 3.8L V6 GAS Automatic 4 Speed
  Added Jul 2022 • 160 Fuel-ups

  Property of nsmit993

• 20.6 Avg MPG

• My Bonneville

  2003 Pontiac Bonneville SLE 3.8L V6 GAS Automatic 4 Speed
  Added Jul 2022 • 10 Fuel-ups

  Property of SRGIUS

• 19.9 Avg MPG

• 03 Bonneville

  2003 Pontiac Bonneville SE 3.8L V6 GAS Automatic 4 Speed Sedan
  Added May 2018 • 176 Fuel-ups

  Property of Brettm33

• 26.7 Avg MPG

• zzzCasey

  2003 Pontiac Bonneville SE 3.8L V6 GAS Automatic 4 Speed
  Added Sep 2020 • 50 Fuel-ups

  Property of ham737

• 24.1 Avg MPG

• Bonneville 2.0

  2003 Pontiac Bonneville SE 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Jul 2020 • 19 Fuel-ups

  Property of erwin8t

• 22.8 Avg MPG

• 2003 SSEi

  2003 Pontiac Bonneville SSEi 3.8L V6 GAS Automatic 4 Speed
  Added Apr 2018 • 8 Fuel-ups

  Property of 2003-SSEi

• 18.8 Avg MPG

• Pontiac Bonneville

  2003 Pontiac Bonneville SSEi 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Dec 2022 • 9 Fuel-ups

  Property of Qurius

• 25.3 Avg MPG

• Bonneville SSEi

  2003 Pontiac Bonneville SSEi 3.8L GAS V6 Automatic 4 Sedan (4 Door)
  Added Dec 2014 • 25 Fuel-ups

  Property of 2003SSEi

• 19.9 Avg MPG

• Shark

  2003 Pontiac Bonneville SE 3.8L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 51 Fuel-ups

  Property of KaRRohre

• 31.5 Avg MPG

• Bonnie

  2003 Pontiac Bonneville SSEi 3.8L GAS V6 Automatic 4 Sedan (4 Door)
  Added Dec 2014 • 80 Fuel-ups

  Property of nitronick08

• 16.8 Avg MPG

• Bonneville

  2003 Pontiac Bonneville SLE 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Jun 2018 • 152 Fuel-ups

  Property of J410Berry

• 22.0 Avg MPG

• Bonneville

  2003 Pontiac Bonneville GAS V6
  Added Jun 2014 • 3 Fuel-ups

  Property of redfan13

• 14.9 Avg MPG

• 2003 Pontiac Bonneville

  2003 Pontiac Bonneville SSEi 3.8L V6 GAS Automatic 4 Speed
  Added Feb 2018 • 20 Fuel-ups

  Property of dougben

• 22.7 Avg MPG

• Bonneville SSEi

  2003 Pontiac Bonneville GAS V6
  Added Mar 2011 • 9 Fuel-ups

  Property of Jeff72

• 17.3 Avg MPG

• Pontiac

  2003 Pontiac Bonneville GAS V6
  Added Oct 2010 • 4 Fuel-ups

  Property of JulieMcD

• 9.2 Avg MPG