Based on data from 57 vehicles, 2,956 fuel-ups and 747,665 miles of driving, the 2003 Lexus IS300 gets a combined Avg MPG of 19.56 with a 0.10 MPG margin of error.

Any Engine Type 3.0L L6 GAS (50) L6 GAS (7) Any Body Style Sedan (13) Wagon (3) Any Submodel Sportcross (5) Base (45) Other (7)

Below you can see a distribution of the fuel-ups with 185 outliers (5.89%) removed.

Following shows the average MPG of each of the 57 vehicles in the system.

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• Flexus

  2003 Lexus IS300 Sportcross 3.0L L6 GAS Automatic 5 Speed
  Added Feb 2021 • 23 Fuel-ups

  Property of Jetpack_Blues

• 19.4 Avg MPG

• Lexy

  2003 Lexus IS300 3.0L L6 GAS Standard 5 Speed Sedan
  Added Oct 2017 • 242 Fuel-ups

  Property of Brehmluke

• 19.5 Avg MPG

• Lexus IS300

  2003 Lexus IS300 3.0L L6 GAS Manual 5 Speed Sedan
  Added Oct 2015 • 170 Fuel-ups

  Property of Shobster

• 20.4 Avg MPG

• IS

  2003 Lexus IS300 Sportcross 3.0L L6 GAS Automatic 5 Speed Wagon
  Added Jul 2021 • 20 Fuel-ups

  Property of kykjykl

• 21.7 Avg MPG

• My IS300

  2003 Lexus IS300 3.0L L6 GAS Automatic 5 Speed
  Added Mar 2021 • 82 Fuel-ups

  Property of Jhansen312

• 20.4 Avg MPG

• My IS300

  2003 Lexus IS300 3.0L L6 GAS Automatic 5 Speed
  Added Oct 2019 • 75 Fuel-ups

  Property of paulallen13

• 18.3 Avg MPG

• 2003 IS300

  2003 Lexus IS300 3.0L L6 GAS Manual 5 Speed
  Added Jul 2020 • 19 Fuel-ups

  Property of PapaGee

• 18.5 Avg MPG

• My IS300

  2003 Lexus IS300 3.0L L6 GAS Manual 5 Speed
  Added Aug 2019 • 111 Fuel-ups

  Property of domtrolene

• 19.8 Avg MPG

• '03 IS300

  2003 Lexus IS300 3.0L L6 GAS Manual 5 Speed Sedan
  Added Jun 2018 • 106 Fuel-ups

  Property of RJ280ZX

• 22.0 Avg MPG

• My IS300

  2003 Lexus IS300 3.0L L6 GAS Automatic 5 Speed
  Added Jan 2019 • 78 Fuel-ups

  Property of flipside909

• 15.5 Avg MPG

• Lexus

  2003 Lexus IS300 Sportcross 3.0L L6 GAS Automatic 5 Speed Wagon
  Added Apr 2018 • 261 Fuel-ups

  Property of oneleggedone

• 19.4 Avg MPG

• My IS300

  2003 Lexus IS300 3.0L L6 GAS Manual 5 Speed
  Added May 2020 • 136 Fuel-ups

  Property of chineserobot

• 20.1 Avg MPG

• Lexi

  2003 Lexus IS300 3.0L L6 GAS Automatic 5 Speed Sedan
  Added Oct 2017 • 123 Fuel-ups

  Property of PsychoSly

• 19.9 Avg MPG

• Monica is300

  2003 Lexus IS300 3.0L L6 GAS Automatic 5 Speed
  Added Sep 2016 • 12 Fuel-ups

  Property of namosa1956

• 25.3 Avg MPG

• My IS300

  2003 Lexus IS300 3.0L L6 GAS Automatic 5 Speed
  Added Jul 2019 • 56 Fuel-ups

  Property of kaisan

• 17.2 Avg MPG

• My IS300

  2003 Lexus IS300 3.0L L6 GAS Automatic 5 Speed
  Added Aug 2018 • 109 Fuel-ups

  Property of omg5mpg

• 20.7 Avg MPG

• My IS300

  2003 Lexus IS300 3.0L L6 GAS Automatic 5 Speed
  Added Jul 2019 • 38 Fuel-ups

  Property of juanreynaga

• 18.2 Avg MPG

• My IS300

  2003 Lexus IS300 3.0L L6 GAS Automatic 5 Speed
  Added Oct 2018 • 16 Fuel-ups

  Property of Moonflower1780

• 36.0 Avg MPG

• Lexus IS300

  2003 Lexus IS300 3.0L L6 GAS Automatic 5 Speed
  Added Oct 2016 • 270 Fuel-ups

  Property of bparker

• 23.5 Avg MPG

• My IS300

  2003 Lexus IS300 3.0L L6 GAS Automatic 5 Speed
  Added Aug 2019 • 13 Fuel-ups

  Property of jpimm

• 16.6 Avg MPG

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