Best Auxiliary Diesel Fuel Tank Solutions for Trucks and SUVs
Discover a curated selection of auxiliary diesel fuel tanks and installation kits designed to extend your vehicle’s range, simplify refueling, and improve reliability on the road. The following picks emphasize durable construction, compatibility with popular makes, and straightforward installation. Read on to compare capacities, mounting options, and key features to find the right fit for your vehicle and driving needs.
Summary of Selected Products
| Product | Brand | Capacity / Type | Compatibility | Notable Feature |
|---|---|---|---|---|
| Auxiliary Fuel Tank Install Kit | RALZAOTO | Diesel Install Kit (1.5″ line) | Ford (1999-2025), Dodge (1999-2012), Chevy/GMC (2011-2022) | Gravity-fed, corrosion-resistant |
| Dee Zee DZ92556NSB Transfer Tank | DEE ZEE | Transfer Tank | Various applications | Heavy duty steel, built-in stability features |
| RDS MFG INC Fuel Tank – 60-Gallon | RDS MFG INC | 60 Gallon | Specific bed configurations | Multiple tank options available |
| RDS MFG INC Auxiliary Fuel Tank 37 Gal – 71804 | RDS MFG INC | 37 Gallon | General mounting, gasoline capable | Top-fed siphon with electric pump |
| RDS MFG INC Rectangular Auxiliary Fuel Tank – 69 Gallon | RDS MFG INC | 69 Gallon | Various dimensions | Top-fed siphon with electric pump |
Auxiliary Diesel Install Kit (Ford/Dodge/Chevy) — Gravity Fueled
This auxiliary fuel tank install kit from RALZAOTO is designed to provide a stable gravity-fed fuel supply to the OE tank, improving refueling flexibility for diesel engines. Constructed from a mix of aluminum and rubber, the kit emphasizes corrosion resistance and long service life. It is specifically advertised as compatible with 1999–2025 Ford, 1999–2012 Dodge, and 2011–2022 Chevy/GMC diesel engines. Users should verify the OEM part number matches 11025 before purchasing to ensure proper fitment.
Key considerations include the kit’s compatibility across multiple brands and model years, the 1 1/2″ fill line, and the emphasis on a gravity-fed system that does not rely on complex pump setups. Installation complexity can vary based on vehicle and existing fuel system configuration; practitioners should plan for secure mounting, appropriate clearances, and potential plumbing modifications.
Dee Zee DZ92556NSB Transfer Tank
The Dee Zee DZ92556NSB transfer tank features heavy-duty 14-gauge steel, a radius curve to reduce weld stress, and five stability baffles with a drain plug. This design supports rugged use and reduces sloshing during vehicle motion, making it a solid choice for those needing a robust auxiliary fueling solution. They emphasize durability and stability as core advantages, which is helpful for long trips or work applications where reliability matters.
Important considerations include material strength, mounting options, and compatibility with existing fuel systems. While designed for versatility, verify mounting dimensions and tank capacity align with your bed space or frame configuration.
RDS MFG INC Fuel Tank — 60-Gallon
This 60-gallon auxiliary fuel tank from RDS MFG INC highlights a broad tank catalog designed to fit various trucks and bed configurations. The listing notes gasoline fueling is allowed when siphoned from the top via an electric pump, offering practical versatility for mixed fuel setups. It’s important to measure bed dimensions and ensure the tank fits within available space while maintaining proper clearance from exhausts and frame members.
Key considerations include material compatibility with diesel fuel if used exclusively, sensor and pump compatibility, and ensuring safe venting and return routes to prevent pressure buildup.
RDS MFG INC Auxiliary Fuel Tank 37 Gal — 71804
The 37-gallon auxiliary fuel tank from RDS MFG INC targets a balance between capacity and installation ease. The product description notes general tank features, including gasoline compatibility when siphoned from the top with an electric pump. This makes it useful for a wide range of vehicles and use cases, particularly where space is more constrained.
When assessing this option, evaluate mounting hardware, pump compatibility, and top-feed siphon reliability. Consider whether you need a smaller footprint that still provides meaningful range extension, and ensure there is adequate clearance for hoses and fittings during installation.
RDS MFG INC Rectangular Auxiliary Fuel Tank — 69 Gal
The 69-gallon rectangular auxiliary fuel tank from RDS MFG INC emphasizes dimensions described as 57.0 inches long by 18.0 inches wide by 16.0 inches high, suggesting a broader but relatively compact footprint suitable for certain truck beds or frame rails. As with other RDS offerings, gasoline fueling is supported when siphoned from the top via an electric pump. This can provide an economical way to increase range for longer trips or specialized work scenarios.
Considerations include overall dimensions relative to vehicle clearance, mounting points, and ensuring the electrical pump and wiring are adequately rated for the chosen fuel type and vehicle electrical system.
RDS MFG INC Fuel Transfer Tank/Toolbox Combo — 60-Gal
This product combines a fuel transfer tank with a toolbox and includes a 8 GPM pump. The combination design emphasizes utility, integrating storage with fuel transfer capability. The description mentions fully welded seams and heavy-duty aluminum mounting brackets, plus a spin collar that eases pump installation. This setup can be advantageous for users needing organized storage alongside fuel access, particularly for trucks used in remote or industrial environments.
Key considerations include assessing space for both toolbox contents and fuel components, ensuring pump electrical compatibility, and confirming that the mounting hardware can handle the weight and vibration during heavy use.
RDS MFG INC — 72548 Fuel Transfer Tank/Toolbox Combo
The 72548 model from RDS MFG INC presents a broadly packaged auto accessory with a toolbox and transfer tank. The listing emphasizes product dimensions and origin (United States), signaling a focus on build quality and compliance with U.S. manufacturing standards. For buyers needing an integrated solution, this option may reduce installation complexity by combining fuel storage with a storage compartment.
Considerations include how the toolbox layout fits alongside the tank, the weight distribution when full, and whether the integrated design aligns with your vehicle’s frame or mounting points.
RDS MFG INC 50 Gal. Rectangular Transfer Tank
The 50-gallon rectangular transfer tank offers a compact option with defined dimensions of 55.0L x 16.0W x 14.0H inches, ideal for tighter spaces while still providing additional range. This unit is described as a liquid fuel container, suitable for various fueling tasks.
When evaluating this option, check compatibility with your vehicle’s bed length, fuel type, and pump integration. A smaller tank can ease installation, but ensure the capacity meets your typical travel or work requirements.
Buying Guide: Key Purchase Considerations For Auxiliary Diesel Tanks
Choosing the right auxiliary diesel tank involves balancing capacity, compatibility, and installation practicality. The following perspectives cover core considerations to help buyers decide what matters most for their vehicle and use case.
- Capacity and space: Larger tanks extend range but require more mounting space and may affect vehicle clearance. Measure available bed or frame area and confirm that a chosen tank fits without interfering with exhaust routes, drive shafts, or suspension components.
- Fuel compatibility: Some tanks are marketed for gasoline, others for diesel. Confirm that the tank and any connected pump or transfer system are rated for diesel use if that is your application. For mixed-use fleets, ensure handling and safety features for different fuels.
- Mounting and installation: Look for tanks with robust mounting brackets, welded seams, and corrosion-resistant materials. Check whether installation requires professional fabrication or can be achieved with standard tools and common mounting points.
- Pump and transfer design: Gravity-fed systems simplify plumbing but depend on vehicle tilt and line positioning. Electric pumps add reliability, but require proper wiring and power supply. Consider the availability of a fill line, venting, and return lines to prevent pressure buildup or overflow.
- Durability and safety: Steel and aluminum constructions offer strength; aluminum tanks save weight but may be more prone to denting. Protective coatings, corrosion resistance, and proper venting improve longevity in harsh environments.
- Integrated tools and storage: Some packages pair a fuel tank with a toolbox or integrated storage. Evaluate whether the added functionality aligns with your needs and whether it affects center of gravity or mounting stability.
- OEM compatibility and part numbers: When buying install kits or tanks intended to replace or supplement factory components, verify OEM part numbers and model year compatibility to avoid fitment issues.
- Warranty and support: Look for warranty terms that cover workmanship, materials, and installation. Availability of replacement fittings and customer support can simplify future maintenance.
- Installation expertise: If you lack experience with fuel systems, consider professional installation. Incorrect wiring, venting, or mounting can pose safety risks and lead to leaks or fuel leakage.
- Usage scenario: For long-haul fleets, prioritize reliability and ease of refueling in remote areas. For hobbyists, consider simplicity and a compact footprint to minimize added vehicle weight and complexity.