Finding a reliable auxiliary diesel fuel tank can extend your vehicle’s range and support long trips or workdays in remote areas. This guide highlights top-rated options designed for durability, compatibility, and ease of installation. Each pick includes key features to help you compare capacity, construction, and mounting considerations before you buy.
| Product | Brand | Capacity | Notes |
|---|---|---|---|
| RDS MFG INC Fuel Tank – 60-Gallon | RDS MFG INC | 60 Gallon | |
| RDS MFG INC Rectangular Auxiliary Fuel Tank – 69 Gallon | RDS MFG INC | 69 Gallon | |
| RDS MFG INC 71083 Rectangular Auxiliary/Transfer Tank – 45 Gallon | RDS MFG INC | 45 Gallon | |
| Landrol 58 Gallon Aluminum Fuel Cell Tank | Landrol | 58 Gallon | |
| RDS MFG INC General-Purpose Fuel Tank – 18-Gallon | RDS MFG INC | 18 Gallon |
Below are five highly relevant products that meet the demand for reliable auxiliary diesel tanks. Each entry includes an overview of construction, capacity, and installation considerations to aid your decision process.
RDS MFG INC Fuel Tank – 60-Gallon

The 60-gallon auxiliary fuel tank from RDS MFG INC offers a balance of capacity and manageability for mid-size trucks and SUVs. Construction emphasizes full-range compatibility with gasoline or diesel pumping via a top-mounted electric pump, depending on your setup. This tank suits vehicles with shorter bed lengths or space-constrained mounting areas. Installation notes advise measuring bed and clearance prior to ordering to ensure a proper fit. The design features robust welds and mounting options compatible with common auxiliary setups, making it a practical choice for extended trips or field work.
RDS MFG INC Rectangular Auxiliary Fuel Tank – 69 Gallon

The 69-gallon rectangular unit from RDS MFG INC emphasizes versatility with a slightly larger capacity and a rectangular footprint that can suit various mounting configurations. Top-fueling is supported when paired with an appropriate electric fuel pump, enabling gravity-assisted transfer when needed. The package dimensions provide a reference for fit within broader vehicle configurations, helping buyers verify alignment with bed length and wheel well clearance. This option is ideal for users needing extra range without sacrificing too much bed space.
RDS MFG INC 71083 Rectangular Auxiliary/Transfer Fuel Tank – 45 Gallon

The 45-gallon model emphasizes durability with fully welded seams to reduce potential leakage points. This tank is designed for steady, long-term use in demanding environments. It supports gasoline auxiliary fueling via top-side pumps, aligning with standard diesel or gasoline transfer setups, depending on your vehicle configuration. Consider this size if you need a lighter alternative to larger tanks without sacrificing essential range for daily work or road trips.
Landrol 58 Gallon Aluminum Fuel Cell Tank

Landrol’s 58-gallon aluminum fuel cell is designed for durability and mobility, with a focus on corrosion resistance and straightforward cleaning. The aluminum construction helps reduce weight while maintaining strength, making it a practical option for trucks and transportation-related applications. The dimensions (roughly 59 inches long, with substantial capacity) support versatile mounting on a range of vehicle chassis. This tank is suitable for users prioritizing a robust, easy-to-maintain solution with significant payload capacity.
RDS MFG INC General-Purpose Fuel Tank – 18-Gallon

The 18-gallon general-purpose tank by RDS MFG INC provides a compact auxiliary option suitable for smaller vehicles or as a supplemental fuel source in more constrained installations. Its lighter footprint makes installation easier and less intrusive on limited bed or chassis space. The description notes compatibility with top-fueling via an electric pump, aligning with standard auxiliary fuel transfer setups. This option is particularly useful for users who require a discreet, lightweight augmentation to their fuel capacity.
Buying Guide
Key considerations when selecting an auxiliary diesel tank include capacity needs, vehicle compatibility, mounting space, and material choice. The following perspectives help buyers evaluate options:
- Capacity versus space: Larger tanks offer extended range but require more mounting space and weight handling. Measure bed length, wheel wells, and available mounting brackets to avoid interference with exhausts, suspension, or steps.
- Material and durability: Aluminum tanks are lighter and corrosion-resistant, while steel variants offer robustness. Aluminum often suits portable or transport-focused applications, while steel may suit heavy-duty use where weight is less of a concern.
- Fuel compatibility and safety: Ensure the tank supports your fuel type (diesel vs. gasoline) and that proper venting, fuel lines, and seals are used. Look for fully welded seams and leak-tested designs for long-term reliability.
- Installation considerations: Some kits include installation hardware and lines, while others assume a separate framework. Check for compatibility with your OE fuel system, including fill lines and venting.
- Top-fueling versus gravity feed: Some products are designed to work with electric fuel pumps elevating the fuel to a top outlet, while others rely on gravity feed. Choose based on your pump availability and desired transfer rate.
- Weight distribution and vehicle impact: A larger tank shifts weight distribution. Plan mounting to maintain stability, especially for off-road or high-load use.
- Maintenance and cleaning: Aluminum tanks are easier to clean and resist corrosion; consider interior coatings and external brackets for rust prevention.
Cross-referencing the featured products, buyers can balance capacity, mounting space, and build quality. For longer expeditions or high-mileage workdays, higher-capacity models with fully welded seams and durable mounting hardware offer the best long-term value. For smaller vehicles or limited bed space, an 18- to 45-gallon option may provide adequate range without sacrificing handling.