Based on data from 50 vehicles, 2,838 fuel-ups and 770,826 miles of driving, the 2003 Buick Century gets a combined Avg MPG of 23.26 with a 0.19 MPG margin of error.

Any Engine Type 3.1L V6 GAS (41) GAS (1) V6 GAS (7) Any Body Style Sedan (21) Any Submodel Custom (41) Other (9)

Below you can see a distribution of the fuel-ups with 45 outliers (1.56%) removed.

Following shows the average MPG of each of the 50 vehicles in the system.

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• Buick

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed
  Added Mar 2017 • 29 Fuel-ups

  Property of Tardis7

• 28.1 Avg MPG

• Buick

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed Sedan
  Added Oct 2017 • 89 Fuel-ups

  Property of rminkler

• 22.0 Avg MPG

• Louise

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed Sedan
  Added Sep 2019 • 28 Fuel-ups

  Property of bwollard

• 26.1 Avg MPG

• Buick Century

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed
  Added Aug 2018 • 9 Fuel-ups

  Property of wleeper

• 25.9 Avg MPG

• Dan's

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed
  Added Nov 2016 • 215 Fuel-ups

  Property of dans316

• 19.8 Avg MPG

• My Century

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed
  Added Jul 2017 • 63 Fuel-ups

  Property of sirius00

• 17.8 Avg MPG

• Whits car

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed
  Added Nov 2016 • 67 Fuel-ups

  Property of wwisner

• 19.3 Avg MPG

• buick

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed Sedan
  Added Jul 2018 • 129 Fuel-ups

  Property of Mjo36957

• 26.5 Avg MPG

• My Century

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed
  Added Apr 2020 • 9 Fuel-ups

  Property of Chilli

• 37.9 Avg MPG

• Buick

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed
  Added Sep 2017 • 308 Fuel-ups

  Property of bsmith2252

• 20.0 Avg MPG

• CAR 4 SNO

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed Sedan
  Added Jun 2019 • 35 Fuel-ups

  Property of viasound

• 26.6 Avg MPG

• Century

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed Sedan
  Added Aug 2018 • 8 Fuel-ups

  Property of memeguy

• 27.1 Avg MPG

• Gracie

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed
  Added Mar 2018 • 54 Fuel-ups

  Property of tricerah

• 21.2 Avg MPG

• Bevs Buick

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed Sedan
  Added Sep 2018 • 86 Fuel-ups

  Property of chuckcrow

• 29.2 Avg MPG

• Copper

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed Sedan
  Added Jan 2019 • 284 Fuel-ups

  Property of garonic

• 24.6 Avg MPG

• Shirley

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed Sedan
  Added Apr 2018 • 22 Fuel-ups

  Property of WendyIvey

• 23.8 Avg MPG

• Silver Bullet 2.0

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed Sedan
  Added Apr 2018 • 48 Fuel-ups

  Property of Careist8247

• 27.2 Avg MPG

• Marshall's car

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed Sedan
  Added Jan 2019 • 4 Fuel-ups

  Property of Mgreen6

• 24.5 Avg MPG

• Buick Century

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed
  Added Jan 2018 • 130 Fuel-ups

  Property of mmartin798

• 23.1 Avg MPG

• My Century

  2003 Buick Century Custom 3.1L V6 GAS Automatic 4 Speed Sedan
  Added Jan 2016 • 163 Fuel-ups

  Property of mewhinney

• 25.9 Avg MPG

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