1. home
  2. news
  3. Top 5 Large-Capacity Diesel Fuel Tanks

Top 5 Large-Capacity Diesel Fuel Tanks

Large-capacity diesel fuel tanks are fast becoming necessary accessories for today’s diesel pickup trucks.

KJ JonesAuthor

Diesel fuel. For all intent and purpose, it is the absolute life blood of engines that share its name; the 3.0L, 5.9L, 6.7L, and other powerplants that motivate the pickup trucks we drive. It's the elixir that today can cost upwards of $4.00 per gallon in some U.S. cities, and due to this expense, making the most of every drop usually is a diesel-pickup owner's top priority.

Yes, a truck being able to go the proverbial "extra mile"--or miles—fuel wise, is every owner's dream. And, with oil burners, those high fuel costs definitely make the desire much greater. Because, when owning a diesel pickup truck is processed from an economic perspective, maximizing performance without consuming a lot of fuel is Utopia.

Of course, driving style (the degrees to which a driver's foot is heavy or light on the throttle) plays a critical role in extending fuel mileage, as do ECM tuning, rearend gearing and other variables. However, one sure-fire method of extending a truck's mileage range and boosting mpg, is installing a large-capacity diesel fuel tank.

The two most popular types of large-capacity diesel fuel tanks are steel or aluminum auxiliary cells that mount in a truck's bed and either feed the OEM tank, or are used for transferring fuel to other vehicles or machines, and injection-molded-plastic units that directly replace a pickup's stock rear- or midship-mounted fuel tank.

Capacities for any of these tanks range between 30- and more than 100 gallons, and they typically can be installed by DIY hobbyists that have the tools and workspace necessary for doing the job.

While companies such as TransferFlow lead the way in replacement midship fuel-tank offerings for late-model (2013 to present) diesel rigs, Dee Zee specializes in the aforementioned bed-mount cells that work in early and newer trucks. New to the game is S&B Tanks, who has developed a very impressive, bolt-in 70-gallon upgrade for crew-cab longbed 2017- to present Ford Super Duty, and is adding similar upgrade cells for GM and Ram trucks.

For extending a diesel pickup truck's mileage range—especially 2500 or 3500 Series heavy-duty rigs that are used commercially to haul loads great distances (and time is money)--we suggest tanks of 50 gallons or better.

Here are our choices for five large-capacity diesel fuel tanks that we think are solid options for trucks at the newer end of the diesel spectrum. We recommend contacting and consulting manufacturers' web sites for specific details on all their products and assistance with choosing the right tank for your application.

Recommended Brands and Tanks

TransferFlow

  • 50-Gallon 2013 to 2018 Ram 2500 Mega Cab Midship Replacement Fuel System PN: 0800116792
  • 55-Gallon 2017-2019 Chevy/GMC (2500/3500) Midship Replacement Fuel Tank PN: 0800116786
  • 60-Gallon 2017-2020 Ford (Super Duty) Midship Replacement Fuel Tank PN: 0800116565

S&B Tanks

  • 70-Gallon 2017 to 2020 Super Duty (Crew Cab longbed) Replacement Fuel Tank

Dee Zee

  • 92-Gallon L-Shape Aluminum Auxiliary Tank (Universal)

 

Pros and Cons

Pros

  • Extended mileage range
  • Increased fuel economy
  • Direct replacement
  • DIY installation
  • Some bed-mount models include a tool box

Cons

  • Increased weight
  • Reduced bed space
  • May interfere with four-wheel-drive transfer case
Related Articles