Based on data from 65 vehicles, 3,178 fuel-ups and 891,093 miles of driving, the 2018 Toyota Sienna gets a combined Avg MPG of 20.27 with a 0.15 MPG margin of error.

Any Engine Type 3.5L V6 GAS (61) Any Body Style Mini Passenger Van (27) Any Submodel L (1) Limited (4) SE (5) LE (6) Limited Premium (6) XLE Premium (6) XLE (37)

Below you can see a distribution of the fuel-ups with 44 outliers (1.37%) removed.

Following shows the average MPG of each of the 65 vehicles in the system.

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• Batvan

  2018 Toyota Sienna Limited Premium 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Oct 2019 • 20 Fuel-ups

  Property of fna

• 19.8 Avg MPG

• My Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Sep 2018 • 94 Fuel-ups

  Property of prewchris

• 20.2 Avg MPG

• the Sienna

  2018 Toyota Sienna LE 3.5L V6 GAS Automatic 8 Speed
  Added Jun 2019 • 55 Fuel-ups

  Property of ybmikey

• 18.5 Avg MPG

• Sienna

  2018 Toyota Sienna Limited Premium 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Oct 2018 • 98 Fuel-ups

  Property of almeisner

• 21.6 Avg MPG

• My Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Jun 2018 • 184 Fuel-ups

  Property of brokethru

• 23.6 Avg MPG

• My Sienna

  2018 Toyota Sienna LE 3.5L V6 GAS Automatic 8 Speed
  Added Nov 2019 • 24 Fuel-ups

  Property of ctboston10

• 23.9 Avg MPG

• Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Aug 2018 • 89 Fuel-ups

  Property of rspeters

• 19.6 Avg MPG

• 18 Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added May 2019 • 92 Fuel-ups

  Property of Sellitwithjohn

• 23.8 Avg MPG

• Minnie

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Jan 2020 • 22 Fuel-ups

  Property of wooska

• 21.0 Avg MPG

• 2018 Toyota Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Feb 2020 • 38 Fuel-ups

  Property of tomnmarlie

• 21.3 Avg MPG

• Violet

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Oct 2018 • 85 Fuel-ups

  Property of pinoyxr

• 19.1 Avg MPG

• Hugo

  2018 Toyota Sienna XLE Premium 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Dec 2018 • 119 Fuel-ups

  Property of Brendan

• 21.9 Avg MPG

• My Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Jul 2018 • 118 Fuel-ups

  Property of Joelyisthebest

• 19.6 Avg MPG

• Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed Mini Passenger Van
  Added Jan 2019 • 65 Fuel-ups

  Property of Coreymccraw

• 20.7 Avg MPG

• My Sienna

  2018 Toyota Sienna XLE
  Added Jan 2018 • 146 Fuel-ups

  Property of doulamama

• 20.6 Avg MPG

• Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added May 2018 • 129 Fuel-ups

  Property of ericburn

• 22.0 Avg MPG

• My Sienna

  2018 Toyota Sienna SE 3.5L V6 GAS Automatic 8 Speed
  Added Feb 2020 • 26 Fuel-ups

  Property of mindiwalters

• 21.1 Avg MPG

• My Sienna

  2018 Toyota Sienna XLE Premium 3.5L V6 GAS Automatic 8 Speed
  Added May 2020 • 29 Fuel-ups

  Property of AliciaC82

• 18.7 Avg MPG

• Swagger Wagon

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Sep 2018 • 64 Fuel-ups

  Property of brockeverly

• 22.8 Avg MPG

• 2018 Sienna

  2018 Toyota Sienna XLE 3.5L V6 GAS Automatic 8 Speed
  Added Dec 2019 • 17 Fuel-ups

  Property of jswitze

• 22.5 Avg MPG

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