Based on data from 88 vehicles, 6,582 fuel-ups and 2,457,801 miles of driving, the 2021 Ram 3500 gets a combined Avg MPG of 12.01 with a 0.11 MPG margin of error.

Any Engine Type 6.4L V8 GAS (8) 6.7L L6 DIESEL (75) Any Body Style Standard Cab Pickup (2) Crew Cab Pickup (13) Cab & Chassis (1) Extended Crew Cab Pickup (5) Any Submodel Lone Star (1) Laramie Longhorn (6) Limited (16) Big Horn (16) Tradesman (16) Laramie (33)

Below you can see a distribution of the fuel-ups with 129 outliers (1.92%) removed.

Following shows the average MPG of each of the 88 vehicles in the system.

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• Silver bullet

  2021 Ram 3500 Tradesman 6.7L L6 DIESEL Automatic 6 Speed
  Added Jun 2021 • 305 Fuel-ups

  Property of pls313

• 15.4 Avg MPG

• Jarvis

  2021 Ram 3500 Limited 6.7L L6 DIESEL Automatic 6 Speed
  Added Mar 2021 • 182 Fuel-ups

  Property of jamessgibson

• 10.9 Avg MPG

• White Riot

  2021 Ram 3500 Laramie Longhorn 6.7L L6 DIESEL Automatic 6 Speed
  Added Apr 2021 • 80 Fuel-ups

  Property of b16gsr

• 10.1 Avg MPG

• ‘21 RAM 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added Nov 2021 • 125 Fuel-ups

  Property of T-Ball

• 14.1 Avg MPG

• Ruby

  2021 Ram 3500 Big Horn 6.7L L6 DIESEL Automatic 6 Speed Extended Crew Cab Pickup
  Added Aug 2021 • 233 Fuel-ups

  Property of HomeyHD

• 13.7 Avg MPG

• My 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added Apr 2021 • 420 Fuel-ups

  Property of Fathead

• 10.6 Avg MPG

• 2021 RAM 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed Extended Crew Cab Pickup
  Added Sep 2023 • 132 Fuel-ups

  Property of larso412

• 18.4 Avg MPG

• My 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added Jan 2023 • 56 Fuel-ups

  Property of trevortoy

• 12.0 Avg MPG

• My 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added Aug 2024 • 43 Fuel-ups

  Property of BarMD

• 17.9 Avg MPG

• My 3500

  2021 Ram 3500 Laramie Longhorn 6.7L L6 DIESEL Automatic 6 Speed
  Added Mar 2022 • 48 Fuel-ups

  Property of KGBoettcher

• 11.9 Avg MPG

• My 3500

  2021 Ram 3500 Limited 6.7L L6 DIESEL Automatic 6 Speed
  Added Nov 2022 • 79 Fuel-ups

  Property of Koz24

• 15.6 Avg MPG

• My 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added May 2021 • 390 Fuel-ups

  Property of taterdude

• 11.7 Avg MPG

• My 3500

  2021 Ram 3500 Limited 6.7L L6 DIESEL Automatic 6 Speed
  Added Jun 2021 • 271 Fuel-ups

  Property of Brett81

• 15.3 Avg MPG

• My 3500

  2021 Ram 3500 Limited 6.7L L6 DIESEL Automatic 8 Speed
  Added Feb 2021 • 118 Fuel-ups

  Property of mradamja

• 11.9 Avg MPG

• My 3500

  2021 Ram 3500 Laramie 6.4L V8 GAS Automatic 6 Speed
  Added Feb 2021 • 103 Fuel-ups

  Property of gryver

• 11.3 Avg MPG

• Ram 3500

  2021 Ram 3500 Limited
  Added Mar 2021 • 438 Fuel-ups

  Property of TRMNTR

• 11.7 Avg MPG

• 2021 Ram 3500

  2021 Ram 3500 Big Horn 6.7L L6 DIESEL Automatic 6 Speed
  Added Jun 2021 • 90 Fuel-ups

  Property of hirschjn

• 12.4 Avg MPG

• My 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added May 2021 • 167 Fuel-ups

  Property of lazer_beem

• 14.5 Avg MPG

• My Ram 3500

  2021 Ram 3500 Big Horn 6.7L L6 DIESEL Automatic 6 Speed
  Added Mar 2025 • 4 Fuel-ups

  Property of BigNotes

• 12.6 Avg MPG

• My 3500

  2021 Ram 3500 Limited 6.7L L6 DIESEL Automatic 6 Speed
  Added Apr 2021 • 84 Fuel-ups

  Property of akash13

• 13.6 Avg MPG

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