Based on data from 83 vehicles, 7,439 fuel-ups and 2,091,079 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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• My Sienna

  2018 Toyota Sienna XLE Premium 3.5L V6 GAS Automatic 8 Speed
  Added Dec 2023 • 5 Fuel-ups

  Property of jpeek29208

• 21.9 Avg MPG

• Med Van 03

  2018 Toyota Sienna 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Aug 2021 • 270 Fuel-ups

  Property of shawley2868

• 22.3 Avg MPG

• 18 Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added May 2019 • 240 Fuel-ups

  Property of Sellitwithjohn

• 24.8 Avg MPG

• Toyota Sienna

  2018 Toyota Sienna LE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Aug 2022 • 42 Fuel-ups

  Property of brentyost

• 23.8 Avg MPG

• 2018 Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Jul 2023 • 4 Fuel-ups

  Property of doug16

• 22.6 Avg MPG

• My Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Aug 2018 • 78 Fuel-ups

  Property of Robert_M

• 21.4 Avg MPG

• Swagger Wagon

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Sep 2018 • 117 Fuel-ups

  Property of brockeverly

• 21.6 Avg MPG

• 2018 Sienna Brown 235/55 R18

  2018 Toyota Sienna SE 3.5L V6 GAS Automatic 8 Speed
  Added Feb 2019 • 42 Fuel-ups

  Property of wenkate1992

• 22.9 Avg MPG

• 2018 Toyota Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Oct 2018 • 76 Fuel-ups

  Property of bayarea2007

• 26.1 Avg MPG

• My Sienna

  2018 Toyota Sienna SE Premium 3.5L V6 GAS Automatic 8 Speed
  Added Mar 2021 • 40 Fuel-ups

  Property of Djtux

• 23.4 Avg MPG

• My Sienna

  2018 Toyota Sienna XLE
  Added Jan 2018 • 223 Fuel-ups

  Property of doulamama

• 20.4 Avg MPG

• Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Jan 2019 • 109 Fuel-ups

  Property of Coreymccraw

• 20.4 Avg MPG

• Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Aug 2018 • 127 Fuel-ups

  Property of rspeters

• 19.8 Avg MPG

• My Sienna

  2018 Toyota Sienna LE 3.5L V6 GAS Automatic 8 Speed
  Added Sep 2021 • 3 Fuel-ups

  Property of johnswinbornejr

• 25.5 Avg MPG

• My Sienna

  2018 Toyota Sienna SE 3.5L V6 GAS Automatic 8 Speed
  Added Sep 2018 • 66 Fuel-ups

  Property of amhaynes13

• 18.1 Avg MPG

• 2018 Toyota Sienna SE FWD

  2018 Toyota Sienna SE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Sep 2020 • 4 Fuel-ups

  Property of TK3

• 19.0 Avg MPG

• 2018 Toyota Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Feb 2020 • 48 Fuel-ups

  Property of tomnmarlie

• 21.2 Avg MPG

• Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added May 2018 • 130 Fuel-ups

  Property of ericburn

• 22.0 Avg MPG

• Blue Van

  2018 Toyota Sienna XLE Premium 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Mar 2020 • 14 Fuel-ups

  Property of Bluevan

• 25.1 Avg MPG

• Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Dec 2019 • 86 Fuel-ups

  Property of DomesticLimo2018

• 20.0 Avg MPG

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