Based on data from 81 vehicles, 5,308 fuel-ups and 1,948,710 miles of driving, the 2021 Ram 3500 gets a combined Avg MPG of 11.99 with a 0.12 MPG margin of error.

Any Engine Type 6.4L V8 GAS (8) 6.7L L6 DIESEL (68) Any Body Style Standard Cab Pickup (2) Crew Cab Pickup (12) Cab & Chassis (1) Extended Crew Cab Pickup (5) Any Submodel Lone Star (1) Laramie Longhorn (6) Tradesman (13) Big Horn (15) Limited (16) Laramie (30)

Below you can see a distribution of the fuel-ups with 91 outliers (1.69%) removed.

Following shows the average MPG of each of the 81 vehicles in the system.

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• My 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added Apr 2021 • 332 Fuel-ups

  Property of Fathead

• 10.5 Avg MPG

• 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added May 2021 • 45 Fuel-ups

  Property of got_traction

• 15.5 Avg MPG

• RAM 3500 Larimie

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added Mar 2023 • 11 Fuel-ups

  Property of mdg777

• 16.1 Avg MPG

• My 3500

  2021 Ram 3500 Tradesman 6.7L L6 DIESEL Automatic 6 Speed
  Added Jun 2021 • 425 Fuel-ups

  Property of saulG96

• 12.5 Avg MPG

• 2021 Ram 3500

  2021 Ram 3500 Laramie Longhorn 6.7L L6 DIESEL Automatic 6 Speed
  Added Mar 2021 • 77 Fuel-ups

  Property of DeweyWilliams

• 9.9 Avg MPG

• My 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added May 2021 • 140 Fuel-ups

  Property of lazer_beem

• 14.6 Avg MPG

• My 3500

  2021 Ram 3500 Limited 6.7L L6 DIESEL Automatic 6 Speed
  Added Jun 2021 • 215 Fuel-ups

  Property of Brett81

• 15.2 Avg MPG

• Ram 3500

  2021 Ram 3500 Limited
  Added Mar 2021 • 333 Fuel-ups

  Property of TRMNTR

• 11.7 Avg MPG

• 2021 RAM 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed Extended Crew Cab Pickup
  Added Sep 2023 • 102 Fuel-ups

  Property of larso412

• 18.3 Avg MPG

• Goliath

  2021 Ram 3500 Limited 6.7L L6 DIESEL Automatic 6 Speed Extended Crew Cab Pickup
  Added Sep 2021 • 35 Fuel-ups

  Property of SoonerFan

• 11.3 Avg MPG

• My 3500

  2021 Ram 3500 Limited 6.7L L6 DIESEL Automatic 6 Speed
  Added Apr 2021 • 60 Fuel-ups

  Property of akash13

• 13.7 Avg MPG

• Silver bullet

  2021 Ram 3500 Tradesman 6.7L L6 DIESEL Automatic 6 Speed
  Added Jun 2021 • 236 Fuel-ups

  Property of pls313

• 15.0 Avg MPG

• ‘21 RAM 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added Nov 2021 • 83 Fuel-ups

  Property of T-Ball

• 14.7 Avg MPG

• Ruby

  2021 Ram 3500 Big Horn 6.7L L6 DIESEL Automatic 6 Speed Extended Crew Cab Pickup
  Added Aug 2021 • 165 Fuel-ups

  Property of HomeyHD

• 13.5 Avg MPG

• My 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added May 2021 • 303 Fuel-ups

  Property of taterdude

• 11.9 Avg MPG

• Ram 3500

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Aug 2021 • 95 Fuel-ups

  Property of hbwatson

• 11.5 Avg MPG

• 2021 Ram 3500

  2021 Ram 3500 Big Horn 6.7L L6 DIESEL Automatic 6 Speed
  Added Jun 2021 • 81 Fuel-ups

  Property of hirschjn

• 12.5 Avg MPG

• My 3500

  2021 Ram 3500 Limited 6.7L L6 DIESEL Automatic 8 Speed
  Added Feb 2021 • 84 Fuel-ups

  Property of mradamja

• 11.9 Avg MPG

• BBJ

  2021 Ram 3500 Laramie 6.7L L6 DIESEL Automatic 6 Speed
  Added Feb 2021 • 169 Fuel-ups

  Property of tcorno43

• 10.3 Avg MPG

• 2021 3500

  2021 Ram 3500 Tradesman 6.7L L6 DIESEL Automatic 6 Speed
  Added Mar 2021 • 51 Fuel-ups

  Property of MR4WLR

• 12.9 Avg MPG

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