A strong semi-truck fuel tank choice offers usable capacity, secure construction, and dimensions that suit the truck and its fueling setup. This roundup compares seven listed tanks, from compact 36-gallon steel models to a 111-gallon aluminum combo tank with built-in toolbox storage. Most are transfer or auxiliary tanks, not direct replacements for a truck’s factory fuel tank, so confirm intended use and installation compatibility before buying.
Capacity, material, weight, and available features vary substantially: some include baffles, lockable caps, or mounting hardware, while others combine storage with fuel capacity. The Dee Zee aluminum combo ranks first for its 111-gallon capacity and integrated storage; smaller RDS and Better Built options may suit buyers with tighter space or lower capacity needs.
The Dee Zee DZ92656B Aluminum Combo is the leading choice in this group because it combines the largest listed capacity, 111 gallons, with a toolbox and an aluminum construction. Its product details also list three stability baffles, a lockable cap, a drainage plug, and venting. It is a transfer tank for non-flammable liquids, so verify that its dimensions, intended fuel use, and installation arrangement match your truck before choosing it.
Our Top Picks
Best OverallDee Zee DZ92656B Aluminum Combo
Its 111-gallon capacity leads this group, while the aluminum combo design adds toolbox storage, three stability baffles, a lockable cap, and venting.
View on Amazon
Steel Combo StorageThe 92-gallon steel tank pairs fuel capacity with bolted-on storage and lists a stability baffle, lockable cap, and drainage plug.
View on Amazon
Largest Rectangular TankThis rectangular aluminum auxiliary tank holds 69 gallons, and RDS describes diesel gravity feeding from the tank bottom with an optional install kit.
View on Amazon- Aluminum Mid-Capacity RDS 71083 Transfer Tank
Compare the tanks by capacity, construction, and intended use
| # | Product | Capacity | Material | Weight | Buy |
|---|---|---|---|---|---|
| 1 | 1. Dee Zee DZ92656B Aluminum ComboBest Overall | 111 gallons | Aluminum | 59 lb | View on Amazon |
| 2 | 2. Dee Zee DZ92647SB Steel ComboSteel Combo Storage | 92 gallons | Alloy Steel | 49 lb | View on Amazon |
| 3 | 3. RDS 70326 Auxiliary TankLargest Rectangular Tank | 69 gallons | Aluminum | 16 oz | View on Amazon |
| 4 |  4. RDS 71083 Transfer TankAluminum Mid-Capacity | 45 gallons | Aluminum | 42 lb | View on Amazon |
| 5 |  5. Dee Zee DZ92556NSB Transfer TankBaffled steel transfer tank | 128 liters | Alloy Steel | 70 lb | View on Amazon |
| 6 |  6. Better Built 29211584 Steel TankSteel tank for working trucks | 36 gallons | Alloy Steel | 40 lb | View on Amazon |
| 7 |  7. Dorman 576-341 Fuel TankSpecified-vehicle replacement tank | 34 gallons | Alloy Steel | 38.2 lb | View on Amazon |
Detailed Reviews: Best Fuel Tanks For Semi Trucks
#1 · Best Overall
1. Dee Zee DZ92656B Aluminum Combo
- Capacity: 111 gallons
- Material: Aluminum
- Weight: 59 lb
Best for: Large-capacity aluminum combo tank.
Why it ranks #1: Its 111-gallon capacity leads this group, while the aluminum combo design adds toolbox storage, three stability baffles, a lockable cap, and venting.
A 111-gallon capacity and attached tool-box storage make this Dee Zee aluminum combo tank suited to truck operators combining fuel and gear in one L-shaped unit. Its .125-inch Brite-Tread aluminum and black powder-coat finish specify the construction and exterior treatment for this large-capacity setup.
The 56.25-by-32.75-by-25.375-inch L-shape gives buyers concrete dimensions for checking truck-bed space before installation. Because tool storage is bolted onto the transfer tank, the combination consolidates two functions in one assembly. Three stability baffles address contents shifting in transit, while the lockable cap and venting coupler are specified tank features. A .375-inch drainage plug supports draining, and the black powder coat finishes the Brite-Tread aluminum exterior.
- 111-gallon capacity
- Bolted-on tool-box storage
- .125-inch Brite-Tread aluminum
- Three stability baffles
- The 111-gallon combo unit needs more bed space than the smaller 92-gallon Dee Zee DZ92647SB.
Skip it if you need a smaller steel combo unit; Dee Zee DZ92647SB pairs 92-gallon capacity with tool-box storage.
Choose this Dee Zee for operators who need high-capacity fuel storage and attached gear storage in an aluminum combo unit. Its 56.25-inch length and L-shaped dimensions make available truck-bed space the essential fit consideration.
Full product details
| Brand | DEE ZEE |
|---|---|
| Capacity | 111 gallons |
| Color | Black |
| Included Components | Transfer Tank |
| Item Dimensions W x H | 56.25"W x 25.38"H |
| Item Weight | 59 pounds |
| Manufacturer | Dee Zee |
| Material | Aluminum |
| Model Number | DZ 92656B |
| Dimensions | 56.25"W x 25.38"H |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov Proposition 65 Warning for California Consumers WARNING: Cancer – www.P65Warnings.ca.gov |
Listed on Amazon as: Dee Zee DZ92656B Black (111 gallon) Black Aluminum Combo Transfer Tank & Tool Box
View on Amazon#2 · Steel Combo Storage
2. Dee Zee DZ92647SB Steel Combo
- Capacity: 92 gallons
- Material: Alloy Steel
- Weight: 49 lb
Best for: Steel combo tank with tool storage.
Why it ranks #2: The 92-gallon steel tank pairs fuel capacity with bolted-on storage and lists a stability baffle, lockable cap, and drainage plug.
A 92-gallon transfer tank shares its L-shaped assembly with a bolted-on tool box, combining fuel capacity and convenient storage in one truck-bed unit. The black NRT powder coat is specified to increase corrosion protection, while 14-gauge steel and a stability baffle address construction and load movement.
The L-shape measures 46.75 by 32.75 by 25.375 inches, giving buyers dimensions to compare with bed space and other equipment. Combining the tool box with the 92-gallon tank keeps storage attached to the fuel unit, rather than requiring a separate box. Its 14-gauge steel and NRT powder-coat finish provide stated construction and corrosion-protection features; a stability baffle helps control shifting during transport. The listed capacity and shape make this a substantial combo unit.
- 92-gallon capacity
- Bolted-on tool-box storage
- 14-gauge steel construction
- NRT powder coat specified to increase corrosion protection
- The 92-gallon L-shaped combo unit requires more bed space than a standalone tank.
Skip it if you want a 111-gallon aluminum combo tank; Dee Zee DZ92656B offers that greater listed capacity and material.
Pick this Dee Zee for truck operators who want substantial steel fuel capacity and attached tool storage in one L-shaped unit. Its 46.75-by-32.75-by-25.375-inch dimensions make bed-space planning an important fit consideration.
Full product details
| Brand | DEE ZEE |
|---|---|
| Capacity | 92 gallons |
| Color | Black |
| Included Components | Transfer Tank |
| Item Dimensions W x H | 32.75"W x 25.38"H |
| Item Weight | 49 pounds |
| Manufacturer | Dee Zee |
| Material | Alloy Steel |
| Model Number | DZ 92647SB |
| Dimensions | 32.75"W x 25.38"H |
Listed on Amazon as: Dee Zee DZ92647SB (92 gallon) Black Steel Combo Transfer Tank & Tool Box
View on Amazon#3 · Largest Rectangular Tank
3. RDS 70326 Auxiliary Tank
- Capacity: 69 gallons
- Material: Aluminum
- Weight: 16 oz
Best for: High-capacity aluminum auxiliary tank.
Why it ranks #3: This rectangular aluminum auxiliary tank holds 69 gallons, and RDS describes diesel gravity feeding from the tank bottom with an optional install kit.
A 69-gallon capacity makes this RDS rectangular aluminum tank a choice for buyers prioritizing substantial auxiliary fuel storage. The manufacturer describes diesel as gravity-feeding from the tank bottom when connected to a vehicle fuel tank, while gasoline fueling is permitted only through top siphoning with an electric fuel pump.
At 57 by 18 by 16 inches, the tank’s listed dimensions help buyers assess available mounting space before planning an installation. Its aluminum construction provides the material choice for operators seeking an alternative to steel, and the 69-gallon capacity supports a larger onboard reserve than the 45-gallon RDS 71083. RDS describes diesel gravity feed from the bottom when connected to the vehicle tank; gasoline requires top siphoning with an electric fuel pump.
- 69-gallon capacity
- Aluminum construction
- Listed dimensions are 57 by 18 by 16 inches
- Diesel can gravity-feed from the bottom when connected to the vehicle tank
- Gasoline auxiliary fueling requires top siphoning with an electric fuel pump.
Skip it if you want a 45-gallon aluminum tank with fully welded seams; RDS MFG INC 71083 lists both features.
This RDS suits buyers seeking a high-capacity aluminum auxiliary tank and whose installation can accommodate its 57-by-18-by-16-inch dimensions. Check the listed fuel-transfer method against your intended fuel and setup before choosing it.
Full product details
| Brand | RDS MFG INC |
|---|---|
| Capacity | 69 gallons |
| Compatible with Vehicle Type | Multiple vehicle types |
| Included Components | Fuel, System, Fuel |
| Item Dimensions | 57 x 18 x 16 inches |
| Item Weight | 16 ounces |
| Dimensions | 57 x 18 x 16 inches |
| Manufacturer | RDS MFG INC |
| Part Number | 70326 |
| Manufacturer Warranty Description | Manufacturer Warranty |
| Material | Aluminum |
| Model Number | 70326 |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including styrene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: RDS MFG INC Rectangular Auxiliary Fuel Tank – 69 Gallon
View on Amazon#4 · Aluminum Mid-Capacity
4. RDS 71083 Transfer Tank
- Capacity: 45 gallons
- Material: Aluminum
- Weight: 42 lb
Best for: Welded aluminum transfer tank.
Why it ranks #4: Its 45-gallon aluminum body has fully welded seams, and RDS says its transfer tanks can also provide auxiliary fueling.
Fully welded seams and aluminum construction distinguish this 45-gallon RDS tank for buyers seeking a rust-resistant transfer option. RDS also describes diesel gravity-feeding from the bottom when connected to a vehicle fuel tank; gasoline auxiliary fueling is allowed only by top siphoning with an electric fuel pump.
The 45-gallon capacity places this model between smaller transfer tanks and RDS’s 69-gallon rectangular auxiliary tank, giving buyers a middle-capacity option. Aluminum is specified as not rusting, and fully welded seams are listed for durability. For auxiliary use, RDS describes diesel gravity feed from the tank bottom when connected to the vehicle fuel tank. Gasoline requires a different method: siphoning from the top with an electric fuel pump, a distinction that affects setup.
- 45-gallon capacity
- Aluminum tank described as not rusting
- Fully welded seams
- Diesel can gravity-feed from the bottom when connected to the vehicle tank
- Gasoline auxiliary fueling requires top siphoning with an electric fuel pump.
Skip it if you need a larger 69-gallon aluminum tank with listed dimensions; RDS MFG INC 70326 provides that capacity.
This RDS is suited to buyers wanting a 45-gallon aluminum transfer tank with fully welded seams. Consider its stated fuel-transfer methods when planning auxiliary use, especially the top-siphon and electric-pump requirement for gasoline.
Full product details
| Brand | RDS MFG INC |
|---|---|
| Capacity | 45 gallons |
| Color | RDS |
| Included Components | Fuel, System, Fuel |
| Item Weight | 42 pounds |
| Manufacturer | RDS MFG INC |
| Material | Aluminum |
| Model Number | 71083 |
| Warranty Description | Manufacturer Warranty |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including styrene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov |
Listed on Amazon as: RDS MFG INC 71083 Rectangular Auxiliary/Transfer Fuel Tank – 45 Gallon Capacity
View on Amazon#5
5. Dee Zee DZ92556NSB Transfer Tank
- Capacity: 128 liters
- Material: Alloy Steel
- Weight: 70 lb
Best for: Baffled steel transfer tank.
Why it ranks #5: The 42-gallon steel tank lists five stability baffles, mounting tabs, a drain plug, and a three-year limited warranty.
Five stability baffles and a 14-gauge steel body give this Dee Zee tank a transport-focused feature set for non-flammable liquids. Its 42-gallon listed capacity suits buyers seeking a standalone steel tank, while mounting tabs provide a stated way to secure it to the truck bed.
The 59.5-inch width and 19-inch height help establish the space needed for installation, and the mounting tabs are specifically provided to secure the tank to the truck bed. Five stability baffles address movement of contents during transport; the radius-curve construction is described as eliminating key weld pressure points. A black NRT rust-inhibitor powder coat adds corrosion protection, while the drain plug supports draining. The 42-gallon feature listing is the useful capacity figure for comparing this model.
- 42-gallon listed capacity
- Heavy-duty 14-gauge steel
- Five stability baffles
- Mounting tabs to secure it to the truck bed
- Its 42-gallon capacity is lower than the 69-gallon RDS MFG INC 70326.
Skip it if you need 69 gallons in an aluminum tank; RDS MFG INC 70326 offers that capacity and material.
This Dee Zee is for operators who want a standalone steel tank with multiple stability baffles and bed-securing tabs. Its 59.5-inch width, 19-inch height, and 42-gallon listed capacity should suit the installation plan.
Full product details
| Brand | DEE ZEE |
|---|---|
| Capacity | 128 liters |
| Color | black |
| Included Components | Assembly Hardware, Installation Hardware, Tank |
| Item Dimensions W x H | 59.5"W x 19"H |
| Item Weight | 70 pounds |
| Manufacturer | Dee Zee |
| Material | Alloy Steel |
| Model Number | DZ 92556NSB |
| Dimensions | 59.5"W x 19"H |
| Warranty Description | 3 Year Limited Warranty |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including styrene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Dee Zee DZ92556NSB Transfer Tank
View on Amazon#6
6. Better Built 29211584 Steel Tank
- Capacity: 36 gallons
- Material: Alloy Steel
- Weight: 40 lb
Best for: Steel tank for working trucks.
Why it ranks #6: This 36-gallon steel transfer tank includes a mounting kit, rubber bushings, a vented lockable cap, and an overfill restriction.
A 36-gallon steel body pairs with an overfill restriction that shuts off automatically at the pump, helping limit spills during filling. Built-in baffles help keep contents from shifting in transit, while flush-mounted two-inch inlet and outlet bungs support fast flow for transfer work.
The 11-inch-wide, 17-inch-high rectangular profile gives buyers concrete dimensions to plan around, and the included mounting kit with rubber bushings supports installation. Alloy-steel construction and internal baffles address both durability and load movement during transport. A vented, lockable cap adds a way to secure the opening, while the automatic overfill restriction helps manage refueling at the pump. This is a focused transfer tank, rather than a combo tank with tool storage.
- 36-gallon capacity
- Automatic pump shutoff overfill restriction
- Built-in baffles help limit contents shifting
- Two-inch flush-mounted inlet and outlet bungs
- Steel construction makes it heavier than an aluminum tank of comparable capacity.
Skip it if you need more than 36 gallons; RDS MFG INC 70326 holds 69 gallons and is an aluminum auxiliary tank.
Choose this Better Built for truck operators who want a steel transfer tank with spill-conscious filling and fast-flow ports. Its 36-gallon capacity and 11-by-17-inch profile are the key boundaries when planning bed space and fuel needs.
Full product details
| Brand | Better Built |
|---|---|
| Capacity | 36 gallons |
| Color | Gloss Black |
| Included Components | Transfer Tank, Vented Lockable Cap, Mounting Kit with Rubber Bushings |
| Item Dimensions W x H | 11"W x 17"H |
| Item Weight | 40 pounds |
| Manufacturer | Better Built |
| Material | Alloy Steel |
| Model Number | 29211584 |
| Dimensions | 11"W x 17"H |
| Warranty Description | 3-Year |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Better Built Steel Transfer Fuel Tank – 36-Gallon, Rectangular, Black, Model Number 29211584
View on Amazon#7
7. Dorman 576-341 Fuel Tank
- Capacity: 34 gallons
- Material: Alloy Steel
- Weight: 38.2 lb
Best for: Specified-vehicle replacement tank.
Why it ranks #7: Although it has a 34-gallon steel capacity, this is a replacement tank for specified passenger vehicles, not a general-purpose semi-truck transfer tank.
Direct replacement fit for specified vehicle years, makes, and models is the defining feature of this Dorman 34-gallon steel tank, making it a repair part rather than a general-purpose truck-bed transfer tank. Gaskets are included, and Dorman says the tank is cleaned and shipped ready for installation.
The direct-replacement role means the relevant benefit is restoring the original tank on a compatible vehicle, not adding auxiliary fuel storage to a semi truck. Its alloy-steel construction uses rugged materials like the original, and the included gaskets support the replacement task. Dorman states that the part is validated for fit and service life and ships cleaned and ready for installation. Compatibility is limited to specified vehicles, including listed Chevrolet C1500 model years, so vehicle-specific selection matters.
- 34-gallon capacity
- Alloy-steel construction
- Gaskets included
- Cleaned and shipped ready for installation
- This is a specified-vehicle replacement tank, not a general-purpose semi-truck transfer tank.
Skip it if you need a truck-bed auxiliary tank; Better Built 29211584 is a dedicated 36-gallon transfer tank with mounting hardware.
Choose this Dorman only when replacing the original tank on a specified compatible vehicle, rather than adding fuel capacity to a semi. Its 34-gallon capacity and included gaskets serve a repair context, with vehicle application as the key boundary.
Full product details
| Brand | Dorman |
|---|---|
| Capacity | 34 gallons |
| Compatible with Vehicle Type | Car |
| Included Components | Dorman – FUEL TANKS |
| Item Dimensions | 11 x 5 x 3.15 inches |
| Item Weight | 38.2 pounds |
| Dimensions | 11 x 5 x 3.15 inches |
| Manufacturer | Dorman Products |
| Part Number | 576-341 |
| Manufacturer Warranty Description | Limited Lifetime Warranty |
| Material | Alloy Steel |
| Model Number | 576-341 |
Listed on Amazon as: Dorman 576-341 Steel Front Fuel Tank with Gaskets Included
View on AmazonTransfer tanks are not factory replacement tanks
A transfer tank and a direct-replacement fuel tank serve different purposes, so matching gallons alone does not establish compatibility. The RDS descriptions identify auxiliary fueling arrangements: diesel may gravity-feed from the bottom, and an optional diesel install kit is mentioned for the 69-gallon model. The Better Built and Dee Zee products are described as transfer tanks, while the Dorman 576-341 is explicitly a replacement tank for specified vehicle years, makes, and models.
Its listing identifies a car as the compatible vehicle type, making it a poor fit for a general semi-truck auxiliary-fuel search. Before purchase, confirm the truck’s make and model, how the tank connects to the fuel system, and whether a separate pump or installation kit is needed.
Do not assume that a tank’s listed capacity or generic vehicle compatibility means it is approved for a particular truck or installation.
Baffles and mounting matter beyond capacity
A larger tank is not automatically the better fit if its size, mounting, or internal stability features do not suit the truck. Several listings identify baffles intended to limit fuel movement: the Dee Zee steel combo lists a stability baffle, its aluminum combo lists three, and the 42-gallon steel Dee Zee lists five stability baffles. Better Built also describes built-in baffles that add strength and help prevent contents from shifting.
These products differ in capacity and form factor, from rectangular tanks to L-shaped combo units, so check the actual dimensions and bed layout before comparing gallons. The listed weights also range from 40 pounds for the Better Built tank to 70 pounds for the 42-gallon Dee Zee.
That range highlights why buyers should check the truck’s mounting area and payload allowance rather than choosing solely by capacity. Product listings do not establish a truck-specific safe payload or fit.
How to Choose a Semi-Truck Transfer Tank
Capacity and available space
Choose a capacity that fits the available mounting space and how much reserve fuel you need to carry. The options range from 36 gallons for the Better Built 29211584 Steel Tank to 111 gallons for the Dee Zee DZ92656B Aluminum Combo, with 42-, 45-, 69-, and 92-gallon choices between them. The largest tank is not necessarily the easiest to fit: the 69-gallon RDS model measures 57 by 18 by 16 inches, while the 92-gallon steel combo has an L-shaped design.
Buyers prioritizing maximum listed capacity can consider the 111-gallon combo; buyers with limited space or a smaller reserve requirement should compare the smaller tanks’ dimensions against their truck.
Steel or aluminum construction
Select a material that suits your installation priorities, while checking the tank’s weight and protective features. The lineup includes steel options such as the 36-gallon Better Built and 92-gallon Dee Zee combo, as well as aluminum RDS tanks at 45 and 69 gallons and a 111-gallon Dee Zee combo. RDS describes its 45-gallon tank as having fully welded seams and aluminum construction that will not rust; Dee Zee describes a protective black powder-coat finish on its aluminum combo.
Steel may appeal to buyers considering the steel models’ stated coatings and baffles; aluminum options suit buyers looking for a non-steel construction. Compare the listed weight and dimensions too, since the tanks vary considerably.
Fuel handling and included features
Check how the tank is intended to feed fuel and what hardware or security features are actually listed. RDS says diesel can gravity-feed from the bottom of its auxiliary tanks and notes an optional diesel install kit; its 69-gallon description also says gasoline auxiliary fueling is allowed when siphoned from the top using an electric pump. The Better Built tank includes a mounting kit with rubber bushings and a vented lockable cap, while the Dee Zee steel transfer tank lists mounting tabs and a drain plug.
Buyers seeking included mounting components may prefer the Better Built; buyers planning an RDS auxiliary connection should confirm whether the optional kit or a pump is needed. Verify fuel type and installation requirements rather than inferring them from tank capacity.
Which Semi-Truck Fuel Tank Should You Choose?
For the largest listed capacity combined with toolbox storage, choose the Dee Zee DZ92656B Aluminum Combo: it holds 111 gallons and lists three stability baffles and a lockable cap. If you want a steel combo tank with storage, the Dee Zee DZ92647SB Steel Combo offers 92 gallons. For an aluminum rectangular auxiliary tank, consider the RDS 70326 Auxiliary Tank at 69 gallons; the smaller RDS 71083 Transfer Tank holds 45 gallons and has fully welded seams.
Choose the Dee Zee DZ92556NSB Transfer Tank for its 42 gallons and five stability baffles, or the Better Built 29211584 Steel Tank for 36 gallons and included mounting hardware. Avoid the Dorman 576-341 Fuel Tank for general semi-truck transfer use: its listing describes a passenger-vehicle replacement part.
Confirm fit, fuel handling, and installation before ordering.
Related Buying Guides
- Best Sump For Fuel Tank
- Best In Bed Fuel Tanks For Pickups
- Best Aux Fuel Tank For Pickup
- Best Auxiliary Fuel Tank For Gasoline
- Best Steps For Semi Trucks
- Best Chain For Semi Trucks
Frequently Asked Questions
How do I confirm a transfer tank is compatible with my semi truck and fuel system?
Confirm the tank’s intended fuel use, dimensions, capacity, and mounting arrangement against your truck and fuel system before ordering. Check the product details and consult the manufacturer or a qualified installer if anything is unclear. A tank labeled for non-flammable liquids should not be assumed suitable for diesel.
What regulations apply to carrying diesel in an auxiliary or transfer tank?
Requirements depend on where and how the tank is used, as well as its design and installation. Check applicable transportation, fire-safety, and local rules, and follow the tank maker’s labeling and instructions. Do not assume that a tank marketed for liquids is approved for carrying diesel.
Does a transfer tank need a pump, installation kit, or special mounting hardware?
Not every tank includes or requires the same equipment. Check the specific listing for included mounting hardware, then verify what the truck’s installation requires. The Better Built 29211584 listing says mounting hardware is included; for other tanks, confirm included parts and pump needs with the manufacturer or installer.
How should I choose between a combo tank and a standalone tank?
Choose a combo tank if you want tank capacity alongside toolbox storage; the listed Dee Zee combo options include a toolbox. A standalone tank may suit a setup that does not need that storage. Compare capacity, dimensions, construction, intended fuel use, and mounting needs before deciding.
Which listed tank has the largest stated capacity?
The Dee Zee DZ92656B Aluminum Combo has the largest listed capacity in this group at 111 gallons, and it includes a toolbox. Its product details also list three stability baffles, a lockable cap, a drainage plug, and venting. Verify intended fuel use and fit before choosing it.
Final Words
For the largest listed capacity paired with toolbox storage, the Dee Zee DZ92656B is the leading choice, but verify its intended fuel use and fit before ordering. Consider the 92-gallon steel combo for storage, or compare the standalone RDS tanks by capacity and configuration. The Dorman listing describes a passenger-vehicle replacement part, so avoid it for general semi-truck transfer use.
Confirm mounting and fuel compatibility for any selection.
