Based on data from 17 vehicles, 1,467 fuel-ups and 434,291 miles of driving, the 1999 Lexus GS300 gets a combined Avg MPG of 19.94 with a 0.17 MPG margin of error.

Any Engine Type 3.0L L6 GAS (13) L6 GAS (3) V6 GAS (1) Any Body Style Sedan (5) Any Submodel Base (13) Other (4)

Below you can see a distribution of the fuel-ups with 57 outliers (3.74%) removed.

Following shows the average MPG of each of the 17 vehicles in the system.

• My GS300

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed
  Added Sep 2023 • 9 Fuel-ups

  Property of bravoactual86

• 18.5 Avg MPG

• Lexu

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed Sedan
  Added Sep 2024 • 5 Fuel-ups

  Property of LoveFam8

• 19.2 Avg MPG

• Cheng's GS300

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed Sedan
  Added Oct 2013 • 233 Fuel-ups

  Property of ariete

• 19.0 Avg MPG

• My GS300

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed
  Added Jan 2019 • 206 Fuel-ups

  Property of jcoop45

• 22.5 Avg MPG

• 2JZ

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed Sedan
  Added Oct 2019 • 51 Fuel-ups

  Property of shawnfrontier

• 22.9 Avg MPG

• My GS300

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed
  Added Jul 2021 • 11 Fuel-ups

  Property of adrianstunna

• 21.9 Avg MPG

• My GS300

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed
  Added Mar 2022 • 5 Fuel-ups

  Property of aehjai

• 25.7 Avg MPG

• 1999 GS300

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed
  Added Mar 2017 • 182 Fuel-ups

  Property of mailloux

• 23.1 Avg MPG

• Lexus

  1999 Lexus GS300 Special Edition V6 GAS
  Added Oct 2017 • 226 Fuel-ups

  Property of dmartincfp

• 21.0 Avg MPG

• My GS300

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed
  Added Jun 2019 • 8 Fuel-ups

  Property of ladale

• 16.2 Avg MPG

• GS300

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed
  Added Feb 2019 • 6 Fuel-ups

  Property of jjenglish239

• 16.8 Avg MPG

• Lexus

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed
  Added Dec 2017 • 12 Fuel-ups

  Property of Linjy2

• 21.1 Avg MPG

• My GS300

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed
  Added Sep 2015 • 4 Fuel-ups

  Property of KeefRacer

• 22.0 Avg MPG

• GS300

  1999 Lexus GS300 GAS L6
  Added Aug 2013 • 25 Fuel-ups

  Property of okava

• 30.5 Avg MPG

• Lexus

  1999 Lexus GS300 GAS L6
  Added Mar 2014 • 568 Fuel-ups

  Property of wfodave

• 20.8 Avg MPG

• Lexus

  1999 Lexus GS300 3.0L L6 GAS Automatic 5 Speed Sedan
  Added Apr 2018 • 6 Fuel-ups

  Property of dtyler001

• 28.5 Avg MPG

• Gov

  1999 Lexus GS300 GAS L6
  Added Mar 2011 • 87 Fuel-ups

  Property of wednesdayite

• 17.3 Avg MPG