Based on data from 83 vehicles, 7,476 fuel-ups and 2,100,896 miles of driving, the 2018 Toyota Sienna gets a combined Avg MPG of 20.41 with a 0.10 MPG margin of error.

Any Engine Type 3.5L V6 GAS (79) Any Body Style Mini Passenger Van (37) Any Submodel Base (1) SE Premium (2) Limited (4) SE (6) Limited Premium (8) XLE Premium (10) LE (11) XLE (41)

Below you can see a distribution of the fuel-ups with 146 outliers (1.92%) removed.

Following shows the average MPG of each of the 83 vehicles in the system.

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• 1 Sienna

  2018 Toyota Sienna Limited 3.5L V6 GAS Automatic 8 Speed
  Added Jul 2018 • 241 Fuel-ups

  Property of Isophetry

• 16.9 Avg MPG

• Minnie

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Jan 2020 • 230 Fuel-ups

  Property of wooska

• 20.8 Avg MPG

• My Sienna

  2018 Toyota Sienna Limited Premium 3.5L V6 GAS Automatic 8 Speed
  Added Jun 2020 • 175 Fuel-ups

  Property of liangchihao

• 18.8 Avg MPG

• My Sienna

  2018 Toyota Sienna SE 3.5L V6 GAS Automatic 8 Speed
  Added Feb 2020 • 222 Fuel-ups

  Property of mindiwalters

• 21.0 Avg MPG

• 2018 Sienna

  2018 Toyota Sienna XLE Premium 3.5L V6 GAS Automatic 8 Speed
  Added Oct 2019 • 367 Fuel-ups

  Property of brengamgee

• 18.4 Avg MPG

• My Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Jun 2018 • 474 Fuel-ups

  Property of brokethru

• 23.4 Avg MPG

• Toyota Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Dec 2023 • 29 Fuel-ups

  Property of Ssolanyk1

• 23.1 Avg MPG

• My Sienna

  2018 Toyota Sienna XLE Premium 3.5L V6 GAS Automatic 8 Speed
  Added Aug 2023 • 25 Fuel-ups

  Property of jrhackett2000

• 20.0 Avg MPG

• Sienna

  2018 Toyota Sienna Limited Premium 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Oct 2018 • 230 Fuel-ups

  Property of almeisner

• 21.9 Avg MPG

• #Sienna nuevo

  2018 Toyota Sienna XLE Premium 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Nov 2018 • 116 Fuel-ups

  Property of Jetera

• 19.0 Avg MPG

• Sienna

  2018 Toyota Sienna Limited Premium 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Nov 2020 • 99 Fuel-ups

  Property of Yourself

• 17.0 Avg MPG

• Hugo

  2018 Toyota Sienna XLE Premium 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Dec 2018 • 339 Fuel-ups

  Property of Brendan

• 22.6 Avg MPG

• My Sienna

  2018 Toyota Sienna XLE Premium 3.5L V6 GAS Automatic 8 Speed
  Added May 2020 • 270 Fuel-ups

  Property of AliciaC82

• 19.2 Avg MPG

• Sienna

  2018 Toyota Sienna Limited 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Apr 2018 • 86 Fuel-ups

  Property of redsonfire

• 21.0 Avg MPG

• Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Aug 2018 • 115 Fuel-ups

  Property of iamjinmann

• 22.4 Avg MPG

• TOYOTA Sienna

  2018 Toyota Sienna SE Premium 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Jun 2021 • 124 Fuel-ups

  Property of raymond0505

• 21.0 Avg MPG

• 2018 Sienna XLE

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Dec 2019 • 144 Fuel-ups

  Property of jswitze

• 21.0 Avg MPG

• Sienna XLE 2018

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Nov 2020 • 77 Fuel-ups

  Property of bigdadofsix

• 21.2 Avg MPG

• My Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Sep 2018 • 262 Fuel-ups

  Property of prewchris

• 20.1 Avg MPG

• 2018 Sienna AWD XLE

  2018 Toyota Sienna XLE Premium 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Jun 2019 • 105 Fuel-ups

  Property of jcXX

• 18.9 Avg MPG

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