Best in-Bed Auxiliary Fuel Tank Solutions for Diesel Trucks
For extended travel, work trips, or off-road adventures, an in-bed auxiliary fuel tank can dramatically increase range and reduce refueling stops. This guide highlights select gravity-fed and compatible installation kits and tanks designed for diesel engines, spanning popular brands and model years. Each option emphasizes corrosion resistance, durable construction, and straightforward installation to maintain a stable fuel supply from the auxiliary tank to the factory system.
Summary of chosen products
| Product | Brand | Capacity (gal) | Key Benefit |
|---|---|---|---|
| Auxiliary Fuel Tank Install Kit | RALZAOTO | Variable | Stable gravity fueling, diesel-only, OE part# 11025 |
| RDS MFG INC 63Gal Wedge | RDS MFG INC | 63 | Compact wedge design, US origin |
| 11025 Diesel Installation Kit | JURPLIX | — | Comprehensive gravity-fed kit, part #11025 |
| RDS MFG INC Auxiliary Fuel Tank 37Gal | RDS MFG INC | 37 | Flexible gasoline/diesel option, solid construction |
| RDS MFG INC 60 Gallon | RDS MFG INC | 60 | Take-along capacity with robust fittings |
Auxiliary Fuel Tank Install Kit For Diesel Engines
This aluminum and rubber construction is designed to resist corrosion and extend service life. The kit provides a stable gravity-fed fuel supply, enabling controlled fuel transfer from the auxiliary tank to the OE tank. It targets diesel installations and is listed as OE part number 11025, 011025. Installation is described as straightforward, with attention to compatibility checks before purchase to avoid mismatches. The kit’s emphasis on durable materials suits long-haul applications and rugged environments.
RDS MFG INC 63Gal Wedge Auxiliary Tank
RDS MFG INC presents a 63-gallon wedge-shaped auxiliary tank designed for those seeking a balance of capacity and space efficiency. The product is categorized as an auto accessory with dimensions specified in the listing, and it is produced in the United States. The tank supports gasoline fueling and can be integrated with compatible pumps to siphon from the top. This option suits users prioritizing a compact footprint while needing additional fuel storage for longer trips.
11025 Diesel Installation Kit For Ford, Chevy, GMC, Dodge
The 11025 kit is marketed as a complete gravity-fed solution compatible with Dodge Ram 2500/3500 (1999-2012), Chevy Silverado 2500/3500 HD (2011-2022), Ford F-250/F-350 Super Duty (1999-2022), and GMC Sierra 2500/3500 HD (2011-2022). It includes essential components like hoses, shut-off valves, roll-over valves, an aluminum tee, PTFE tape, clamps, and cable ties. The emphasis is on maintaining consistent fuel flow from the auxiliary tank to the factory system while avoiding frequent refills on long trips.
RDS MFG INC 37Gal Auxiliary Tank – 71804
RDS MFG INC offers a 37-gallon auxiliary tank with a focus on variety and compatibility. The listing notes that gasoline fueling is allowed and that the product is part of a broader range of tanks tailored to specific needs. The design emphasizes rugged construction and ease of integration with existing fuel systems, making it a practical choice for mid-range capacity requirements during long drives or work-related trips.
RDS MFG INC 60 Gallon Tank And Toolbox Combo
This 60-gallon setup combines an auxiliary tank with a toolbox, offering a practical solution for users who want additional storage alongside extra fuel capacity. The product listing highlights its US origin and typical auto accessory status, with dimensions designed to fit standard mounting spaces. The combination kit may appeal to users who appreciate consolidated storage and fueling capabilities in one package.
RDS MFG INC Rectangular Auxiliary/Transfer Fuel Tank – 45 Gallon
The 45-gallon rectangular tank from RDS MFG INC emphasizes fully welded seams for durability, a factor important for long-term reliability in harsh environments. The listing notes that gasoline fueling is allowed and describes general compatibility with top-siphon and electric fuel pump configurations. This option provides a middle-ground capacity with a robust construction profile for heavy-duty use.
Buying Guide: Key Purchase Considerations
- Fuel type compatibility: Verify whether the tank supports gasoline, diesel, or both. Gravity-fed systems often rely on gravity to move fuel, so ensuring the right fuel type is critical to performance.
- Capacity and footprint: Choose capacity based on typical trip length and vehicle mounting space. Wedge and rectangular designs have different space requirements; measure your bed area before purchase.
- Material and build quality: Aluminum and rubber components resist corrosion and wear. Look for fully welded seams and corrosion-resistant finishes for longevity in harsh conditions.
- Installation kit contents: Some listings include hoses, clamps, shut-off valves, roll-over valves, and mounting hardware. Confirm all necessary parts are included or budget accordingly for add-ons.
- Compatibility with vehicle models: Check OEM part numbers and model-year compatibility. Diesel installations often have specific fitment windows (for example, Dodge, Ford, Chevy/GMC systems).
- Fuel transfer method: Gravity-fed systems require careful plumbing to maintain consistent flow. Consider whether an electric pump or siphon is needed if you anticipate high fuel transfer demands.
- Maintenance and serviceability: Assess ease of inspection, draining, and replacement parts. Tanks with longer service intervals reduce maintenance downtime on the road.
- Legal and safety considerations: Ensure that any auxiliary tank installation complies with local regulations and vehicle safety standards, including venting and rollover protection where applicable.
- Warranty and origin: Products manufactured in the United States often come with robust support networks. Review warranty terms and return policies before purchasing.
- Installation complexity: Some kits are straightforward for DIY enthusiasts, while others may require professional installation due to wiring, venting, or fuel-line routing complexities.
Across these options, the core advantages include extended driving range, reduced refueling frequency, and the ability to select a tank size that aligns with travel demands. The best choice depends on your vehicle model, fuel type, available bed space, and comfort with installation complexity. When evaluating, prioritize corrosion resistance, secure connections, and proven compatibility with your truck’s engine and fuel system.