Based on data from 19 vehicles, 825 fuel-ups and 221,168 miles of driving, the 2003 Buick Regal gets a combined Avg MPG of 22.06 with a 0.32 MPG margin of error.

Any Engine Type 3.8L V6 GAS (16) V6 GAS (3) Any Body Style Sedan (7) Any Submodel GS (2) LS (14) Other (3)

Below you can see a distribution of the fuel-ups with 31 outliers (3.62%) removed.

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

• 2003 Buick

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Dec 2024 • 16 Fuel-ups

  Property of kvhollis

• 2.0 Avg MPG

• My Regal

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed
  Added Jan 2025 • 31 Fuel-ups

  Property of ALyon07

• 16.4 Avg MPG

• My Regal

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed
  Added Dec 2024 • 18 Fuel-ups

  Property of ALyon

• 12.9 Avg MPG

• Grandpa

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Dec 2022 • 23 Fuel-ups

  Property of modded_yota

• 18.8 Avg MPG

• My Regal

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed
  Added Oct 2018 • 194 Fuel-ups

  Property of dbaley

• 21.5 Avg MPG

• Gilbert Creek Woodworks

  2003 Buick Regal GS 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Feb 2020 • 25 Fuel-ups

  Property of GCWoodwrks

• 24.4 Avg MPG

• Regal

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 7 Fuel-ups

  Property of jppritchard

• 22.2 Avg MPG

• Regal

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Sep 2018 • 27 Fuel-ups

  Property of jpkik96

• 21.1 Avg MPG

• Ronaldo

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 218 Fuel-ups

  Property of slammers

• 25.0 Avg MPG

• My Regal

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed
  Added Nov 2017 • 29 Fuel-ups

  Property of DCRider

• 21.3 Avg MPG

• Buick

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed
  Added Mar 2021 • 43 Fuel-ups

  Property of Zekester

• 19.5 Avg MPG

• Buick Regal LS

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed
  Added Sep 2016 • 23 Fuel-ups

  Property of rockinrod51

• 23.3 Avg MPG

• Rory

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Apr 2014 • 77 Fuel-ups

  Property of shadowfall23

• 23.2 Avg MPG

• Buck

  2003 Buick Regal GS 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Apr 2018 • 5 Fuel-ups

  Property of jdw3md

• 26.7 Avg MPG

• Spencer's Car

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed
  Added Mar 2017 • 50 Fuel-ups

  Property of SpenJCo

• 20.5 Avg MPG

• Regal

  2003 Buick Regal LS 3.8L V6 GAS Automatic 4 Speed Sedan
  Added Aug 2016 • 50 Fuel-ups

  Property of SpenJCo

• 20.5 Avg MPG

• 2003 Buick Regal LS

  2003 Buick Regal GAS V6
  Added May 2011 • 25 Fuel-ups

  Property of vonVeezelsnider

• 19.4 Avg MPG

• Bucki

  2003 Buick Regal GAS V6
  Added May 2012 • 69 Fuel-ups

  Property of Britter

• 23.8 Avg MPG

• Buick Regal

  2003 Buick Regal GAS V6
  Added Aug 2012 • 11 Fuel-ups

  Property of codymeh

• 26.4 Avg MPG