Based on data from 53 vehicles, 5,325 fuel-ups and 1,511,511 miles of driving, the 2018 Mazda CX-9 gets a combined Avg MPG of 21.79 with a 0.10 MPG margin of error.

Any Engine Type 2.5L L4 GAS (46) GAS (2) L4 GAS (2) V4 GAS (2) Any Body Style Sport Utility (29) Any Submodel GS-L (1) Azami LE (1) i Grand Touring (2) 1.5 RS CVT Honda SENSING (3) Signature (6) GT (8) Touring (11) Grand Touring (21)

Below you can see a distribution of the fuel-ups with 121 outliers (2.22%) removed.

Following shows the average MPG of each of the 53 vehicles in the system.

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• My CX-9

  2018 Mazda CX-9 GS-L 2.5L L4 GAS Automatic 6 Speed
  Added Jun 2018 • 198 Fuel-ups

  Property of nickstephens

• 20.3 Avg MPG

• CX-9

  2018 Mazda CX-9 GT 2.5L L4 GAS Automatic 6 Speed Sport Utility
  Added Mar 2018 • 146 Fuel-ups

  Property of jaycan

• 21.0 Avg MPG

• My CX-9 Grand Touring

  2018 Mazda CX-9 Grand Touring 2.5L L4 GAS Automatic 6 Speed
  Added Jul 2021 • 237 Fuel-ups

  Property of VeroBerumen

• 20.4 Avg MPG

• Mazda CX-9

  2018 Mazda CX-9 Grand Touring V4 GAS Automatic 6 Speed Sport Utility
  Added Feb 2025 • 115 Fuel-ups

  Property of Be4givN

• 23.5 Avg MPG

• My CX-9

  2018 Mazda CX-9 Touring 2.5L L4 GAS Automatic 6 Speed
  Added Aug 2024 • 18 Fuel-ups

  Property of Cowens621

• 20.0 Avg MPG

• My CX-9

  2018 Mazda CX-9 Grand Touring 2.5L L4 GAS Automatic 6 Speed
  Added Nov 2017 • 439 Fuel-ups

  Property of Butchyboy

• 21.9 Avg MPG

• My CX-9

  2018 Mazda CX-9 Grand Touring 2.5L L4 GAS Automatic 6 Speed
  Added Apr 2021 • 127 Fuel-ups

  Property of stevesanda

• 21.9 Avg MPG

• My CX-9

  2018 Mazda CX-9 Signature 2.5L L4 GAS Automatic 6 Speed Sport Utility
  Added May 2021 • 146 Fuel-ups

  Property of oldsears

• 24.3 Avg MPG

• CX-9

  2018 Mazda CX-9 Touring GAS Automatic
  Added Feb 2018 • 227 Fuel-ups

  Property of davidgiesberg

• 20.5 Avg MPG

• Mazda CX-9

  2018 Mazda CX-9 Touring 2.5L L4 GAS Automatic 6 Speed Sport Utility
  Added Sep 2019 • 49 Fuel-ups

  Property of thierry_csy

• 24.3 Avg MPG

• 2018 Mazda CX-9

  2018 Mazda CX-9 Grand Touring 2.5L L4 GAS Automatic 6 Speed Sport Utility
  Added Nov 2024 • 11 Fuel-ups

  Property of SiG10

• 18.4 Avg MPG

• My CX-9

  2018 Mazda CX-9 GT 2.5L L4 GAS Automatic 6 Speed
  Added Jul 2018 • 236 Fuel-ups

  Property of JumpingJacques

• 22.9 Avg MPG

• CX-9

  2018 Mazda CX-9 Grand Touring 2.5L L4 GAS Automatic 6 Speed Sport Utility
  Added Sep 2023 • 209 Fuel-ups

  Property of jhufnagle

• 27.0 Avg MPG

• Normandy

  2018 Mazda CX-9 Grand Touring 2.5L L4 GAS Automatic 6 Speed Sport Utility
  Added Jun 2019 • 35 Fuel-ups

  Property of Aonarach

• 20.0 Avg MPG

• My CX-9 Grand Touring

  2018 Mazda CX-9 i Grand Touring 2.5L L4 GAS Automatic 6 Speed
  Added Nov 2021 • 121 Fuel-ups

  Property of moimendez

• 20.1 Avg MPG

• MazdaRati

  2018 Mazda CX-9 1.5 RS CVT Honda SENSING 2.5L L4 GAS Automatic 6 Speed Sport Utility
  Added Mar 2022 • 125 Fuel-ups

  Property of panthermike

• 21.7 Avg MPG

• CX-9

  2018 Mazda CX-9 Grand Touring 2.5L L4 GAS Automatic 6 Speed Sport Utility
  Added Apr 2018 • 157 Fuel-ups

  Property of jhufnagle

• 25.4 Avg MPG

• 2018 CX-9

  2018 Mazda CX-9 GT 2.5L L4 GAS Automatic 6 Speed
  Added Aug 2018 • 488 Fuel-ups

  Property of snoopyben

• 22.3 Avg MPG

• 2018 Mazda CX-9

  2018 Mazda CX-9 Touring 2.5L L4 GAS Automatic 6 Speed Sport Utility
  Added May 2025 • 85 Fuel-ups

  Property of publow13

• 21.6 Avg MPG

• Mazda CX9

  2018 Mazda CX-9 Grand Touring 2,5L L4 GAS Automatic 6 Speed Sport Utility
  Added May 2018 • 320 Fuel-ups

  Property of gbustam

• 19.3 Avg MPG

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