
The Ram 2500 is a heavy-duty pickup truck manufactured by Dodge Ram. It has a range of powerful engine options, including the 6.7L Cummins diesel engine. The fuel tanks for the Ram 2500 diesel are made from a variety of materials, including steel, aluminium, and polyethylene. The stock fuel tank has a capacity of 31 gallons, but larger capacity options are available, such as the 50-gallon Titan Fuel Tank, which is made from corrosion-resistant materials and is designed to be a direct replacement for the stock tank. Other options include auxiliary fuel tanks, which can be installed in the truck bed, and offer even larger capacities, such as the 100-gallon Fuelbox tank.
| Characteristics | Values |
|---|---|
| Fuel tank capacity | 40 Gallon, 41 Gallon, 43 Gallon, 45 Gallon, 46 Gallon, 50 Gallon, 52 Gallon, 55 Gallon, 60 Gallon, 70 Gallon, 80 Gallon, 82 Gallon, 85 Gallon, 100 Gallon |
| Fuel tank material | Crosslink polyethylene, Aluminium, Plastic |
| Fuel tank brands | S&B, ATI, Titan, Trail FX, Transfer Flow |
| Fuel type | Diesel |
| Vehicle models | 2013-2024 Dodge Ram Cummins 6.7L, 2019-2024 Ram 2500/3500, 2017 2500 crew cab, 2016 Ram crew cab |
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What You'll Learn

Fuel tank capacity
The fuel tank capacity of a vehicle is an important factor to consider, especially for those who frequently undertake long-distance travel or require a higher fuel load. The RAM 2500, a robust and versatile pickup truck, offers various fuel tank options to meet different needs.
The standard fuel tank capacity for the RAM 2500 varies depending on the model year and trim level. For the 2024 model year, the fuel tank capacity ranges from 28.0 to 32.0 gallons. The 2023, 2022, 2021, and 2020 models offer a similar range, typically between 31.0 and 32.0 gallons. This pattern continues for older models, such as the 2019 and 2018 RAM 2500, which also have fuel tank capacities between 31.0 and 32.0 gallons.
It's worth noting that some RAM 2500 owners have reported discrepancies between the stated fuel tank capacity and the actual amount of fuel their vehicles can hold. In some cases, the fuel gauge may indicate that the tank is not completely full even when filled shortly after the "low fuel" light comes on. This discrepancy could be due to various factors, including the design of the fuel pump or the calibration of the fuel gauge.
To address this issue and increase fuel capacity, RAM 2500 owners can opt for auxiliary fuel tanks. These additional tanks can be installed in the truck bed and provide several benefits, including increased fuel capacity and the ability to refuel equipment without visiting a fuel pump directly. Auxiliary fuel tanks for the RAM 2500 come in various sizes, such as 40, 50, 70, 80, and even up to 100 gallons, offering greater flexibility to meet specific needs.
Additionally, some aftermarket fuel tanks are available as direct replacements for the factory tank, offering larger capacities for those seeking even more extended ranges between refuels. These replacement tanks are designed to fit in the factory location, providing a seamless upgrade for RAM 2500 owners seeking maximum fuel capacity for their vehicles.
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Fuel tank materials
When it comes to Ram 2500 diesel fuel tanks, there are a few different options available in the market. One popular option is the S&B fuel tank, which is designed as a replacement fuel tank for the Ram 2500 diesel. These tanks are made of crosslink polyethylene, a strong and durable material that is backed by a lifetime warranty. Polyethylene is known for its impact resistance, making it a suitable choice for fuel tanks that need to withstand varying driving and weather conditions.
Another well-known brand is Titan Fuel Tanks, which offers mid-ship, direct replacement fuel tanks for the Ram 2500 diesel. These tanks are notable for their exclusive features, such as the TITAN Torque Mounting Ring, and their commitment to ensuring against corrosion and fuel contamination. While the specific material used by Titan is not explicitly mentioned, their tanks are manufactured in the USA, which is an important factor for some buyers.
In addition to the above, there are auxiliary fuel tanks designed for the Ram 2500 diesel. These tanks are often made of aluminum, such as the ATI rectangular aluminum diesel auxiliary fuel tank, which connects to the factory fuel tank. Aluminum is lightweight and corrosion-resistant, making it suitable for auxiliary fuel tank applications.
For those seeking a custom or DIY approach to their fuel tank setup, materials like steel and plastic are also options. Steel fuel tanks are known for their strength and durability, but they can be heavier and may require careful construction to prevent corrosion. Plastic fuel tanks, on the other hand, are lightweight and can be more affordable, but may not offer the same level of durability as other materials.
Ultimately, the choice of fuel tank material depends on various factors, including the vehicle's specific requirements, the climate and driving conditions it will endure, and the preferences of the owner. It is always advisable to consult with professionals or trusted manufacturers when making decisions about fuel tank materials and installations.
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Fuel tank dimensions
The fuel tank capacity of the 2025 Ram 2500 Crew Cab models with an 8-foot bed is 50 gallons. However, there are a variety of fuel tank options available for the Ram 2500, depending on the model year and bed size.
For the 2019-2024 Ram 2500 with a 6.7 Cummins Diesel Engine, replacement fuel tanks are available in a range of capacities and dimensions. These tanks are designed to replace the midship tank or be installed in the truck's bed.
For the 2005-2024 Dodge Ram Cummins Crew and Quad Cab Short Bed, a 52-gallon replacement fuel tank is available. This tank is made of crosslink polyethylene and designed to use the OEM locking ring to ensure a perfect seal.
For the Ram 2500 with an 8-foot bed, auxiliary fuel tanks with capacities ranging from 40 to 100 gallons are available. These tanks have dimensions such as 60.75 inches in length, 26.75 inches in width, and 22.75 inches in height for the 100-gallon tank, and 62 inches in length, 10 inches in width, and 19.5 inches in height for the 40-gallon tank.
For the Ram 2500 with a 6-foot 4-inch pickup bed, auxiliary fuel tanks with capacities of 40, 50, or 100 gallons are available. The dimensions of these tanks vary slightly, with the 50-gallon tank options having lengths of 54 inches and 54.38 inches, widths of 15.5 inches, and heights of 23.1 inches and 24.5 inches, respectively.
It is important to note that the fuel tank dimensions and capacities may vary depending on the specific model and configuration of the Ram 2500. Additionally, the fuel system calibration can also affect the usable fuel capacity, as some users have reported discrepancies between the fuel gauge and the actual fuel level.
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Fuel tank types
Fuel tanks are designed to store a variety of fluids, including non-organic and organic liquids, vapours, and flammable fluids such as gasoline and diesel fuel. They are manufactured in various designs, sizes, and materials, and can be classified into different types depending on their application.
Industrial Fuel Tanks
Industrial fuel storage tanks, also known as petroleum tanks, are used to store various fluids and flammable liquids such as chemicals, solvents, oil, petrol, and diesel. These tanks can be installed underground or above ground. Underground storage tanks (USTs) are buried at least 10% of their stored volume underground and are regulated, requiring registration with the EPA if used for storing hazardous materials or fuels. Aboveground storage tanks (ASTs) are more popular due to their lower long-term maintenance and upfront costs, ease of maintenance, and lack of need for deep excavation. Another type of industrial fuel storage tank is the self-bunded tank, which has double steel walls to prevent spillage.
Aircraft Fuel Tanks
Aircraft typically use three types of fuel tanks: integral, rigid removable, and bladder. Integral tanks are areas inside the aircraft structure that have been sealed to allow fuel storage, such as the \"wet wing\" design commonly used in larger aircraft. Rigid fuel tanks are built separately from the aircraft and installed in the wings or fuselage. Bladder tanks, or fuel cells, are reinforced rubberized bags installed in a section of the aircraft structure, allowing for the storage of fuel without requiring large cuts into the aircraft structure.
Automotive Fuel Tanks
Automotive fuel tanks, such as those found in the Ram 2500 diesel, can be made of materials such as crosslink polyethylene, which is extremely strong and durable. These tanks can be factory-installed or aftermarket, with options for larger capacities or auxiliary tanks to extend the range of the vehicle.
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Fuel tank manufacturers
Materials Used in Fuel Tanks
- Steel (carbon or stainless)
- Aluminium
- Polyethylene
- Rubber
Some manufacturers offer custom exterior painting and interior linings to suit specific needs.
Types of Fuel Tanks
Fuel tanks can be broadly categorized into two types:
- Above-ground fuel tanks: These tanks are typically used for fuel storage and dispensing. They can be made from steel, aluminium, or polyethylene and are often customizable in terms of size, shape, and mounting style.
- In-vehicle fuel tanks: These tanks are designed to fit specific vehicles, like the Ram 2500 diesel, and are typically made from steel or polyethylene. They may be direct replacements for the factory-installed fuel tank or auxiliary tanks that extend the vehicle's range.
Leading Fuel Tank Manufacturers
Some of the leading fuel tank manufacturers include:
- Southern Tank: Offers robust fuel storage tanks compatible with biodiesel, ethanol, and various other fuels. They provide carbon or stainless steel tanks with optional linings.
- Cleveland Tank: Specializes in diesel fuel tanks for OEM chassis, equipment, and fleet applications. They offer off-the-shelf replacement tanks and custom solutions, utilizing high-grade steel with a black powder-coat finish.
- Jake's Inc.: An industry leader in the fabrication of above-ground fuel tanks, Jake's Inc. is UL 142-certified and manufactures single- and double-wall carbon and stainless steel tanks for both domestic and international enterprises. They offer custom tank construction and a range of surface-coating options.
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Frequently asked questions
The S&B diesel fuel tanks for Ram 2500 are made of crosslink polyethylene.
The fuel tank capacities for Ram 2500 diesel vary depending on the model year and configuration. For example, the 2013-2024 Dodge Ram 6.7 Cummins 2500 Mega Cab Short Bed model has a 50-gallon fuel tank capacity. Other models may have different fuel tank capacities.
Yes, there are auxiliary fuel tanks available for the Ram 2500 diesel. These tanks can provide additional fuel capacity and come in various sizes, such as 40, 50, 70, or even 100 gallons.
You can purchase a replacement fuel tank for your Ram 2500 diesel from various retailers, such as XDP, Platinum Diesel Parts, or Amazon. These retailers offer fuel tanks from different manufacturers, including Titan, S&B, and Transferflow.











































