Find the right replacement or auxiliary fuel tank for your semi truck with a focus on durability, fit, and ease of install. This guide highlights five strong options for operators, drivers, and fleet managers who want reliable fuel storage that minimizes slosh and support wear on trucks. The top picks below are best for long-haul drivers seeking rear-fill or saddle-mount solutions, and for shops needing robust aluminum construction with solid mounting options.
Summary table of selected products:
| Product | Brand | Capacity | Mount Type | |
|---|---|---|---|---|
| 100 Gallon Rear Fill Aluminum Fuel Tank | Mytee Products | 100 Gal | Rear Fill, Driver Left Side | Long-haul tractors needing rear-fill access |
| SMC50A 50 Gallon Aluminum Saddle Mount | Mytee Products | 50 Gal | Saddle Frame Mount | Compact hydraulic/auxiliary applications |
| SMC70AR Aluminum Hydraulic Reservoir, 70 Gallon | Buyers Products Company | 70 Gal | Rear Mount with Brackets | Hydraulic systems and auxiliary reservoirs |
| Rds Aluminum 74551 20 Gal Rectangular Tank | RDS MFG INC | 20 Gal | Rectangular Mounting | Compact auxiliary storage for tight spaces |
| Landrol 58 Gallon Aluminum Tank | Landrol | 58 Gal | Rectangular, Transport Tank | High-capacity auxiliary storage |
100 Gallon Rear Fill Aluminum Fuel Tank
This aluminum tank is designed for heavy-duty Kenworth and similar models, featuring a large 100-gallon capacity and rear-fill access. It is compatible with multiple Kenworth configurations, ensuring a straightforward replacement for fleets with rear-side access. Best for long-haul drivers who prefer a rear-fill design to minimize tank height interference and simplify refueling.
Who this is best for: operators needing high capacity on a driver-side/ rear-fill layout and for technicians performing straightforward OEM-like replacements. Why selected: it covers a broad range of Kenworth models and provides a robust aluminum build for corrosion resistance and durability.
Caution: verify exact fitment for your chassis year and model, as some Kenworth variants may require additional brackets or mounting hardware.
SMC50A 50 Gallon Aluminum Saddle Mount Hydraulic Reservoir
This saddle-mount reservoir uses a compact 50-gallon aluminum design with three 1-1/4″ NPT ports and internal diffusers. It is suitable for hydraulic systems and similar fluids on semi trucks, with a breather cap and reinforced mounting. Best for fleets needing a compact, easy-to-route auxiliary tank with robust mounting and anti-slosh features.
Who this is best for: fleets prioritizing a space-efficient hydraulic reservoir with reliable baffling and port configuration. Why selected: the saddle frame mount and bracket system simplify installation on many common truck frames.
Caution: confirm compatibility with your hydraulic system’s port layout and the specific A050R2AAGXY/A55AS3X references in your parts catalog.
SMC70AR Aluminum Hydraulic Reservoir
The 70-gallon hydraulic reservoir combines aluminum’s corrosion resistance with internal baffling to minimize slosh during operation. Dual rear 2″ NPT return ports aid straightforward hose routing, while mounting brackets support secure installation. Best for trucks needing a larger hydraulic reservoir without significant space impact.
Who this is best for: operators running hydraulic systems requiring a larger volume than 50 gallons but without extensive footprint growth. Why selected: the dual return ports and internal baffling improve flow control and reduce debris buildup in the lines.
Caution: verify your truck’s frame clearance and ensure the mounting brackets align with your chassis holes and spacing.
Rds Aluminum 74551 20 Gal Rectangular Tank
This 20-gallon rectangular auxiliary tank is built with fully welded seams and heavy-duty aluminum mounting brackets. It is pressure-tested and submerged to ensure leak resistance. Best for tight spaces on the vehicle where a compact auxiliary fuel tank is needed, with durable construction for long-term use.
Who this is best for: fleets needing a small, robust secondary fuel storage option in limited spaces. Why selected: full welds and rugged mounting hardware offer dependable installation even in demanding routes.
Caution: check your vehicle’s clearance and available mounting points because rectangular tanks require precise bracket placement for stability.
Landrol 58 Gallon Aluminum Tank
This rectangular 58-gallon aluminum auxiliary tank combines a generous capacity with a compact footprint suitable for longer semi-trucks where space is premium. It emphasizes aluminum construction for corrosion resistance and a durable finish. Best for operators needing substantial extra storage without a large physical footprint.
Who this is best for: drivers and fleets seeking a balance of capacity and space efficiency. Why selected: the rectangular design makes it easier to fit alongside other components while maintaining fuel capacity near 58 gallons.
Caution: confirm exact mounting bracket configuration and hole spacing to fit your chassis model.
Buying Guide
Key purchase considerations for semi truck fuel tanks:
- Capacity vs. space: Evaluate available mounting space and determine if you need high capacity rear-fill or compact saddle-mount options.
- Mounting style: Choose rear-fill, saddle, or rectangular tanks based on your truck’s frame design and the ease of routing hoses and lines.
- Material and corrosion resistance: Aluminum is common for its light weight and corrosion resistance; steel is heavier and sometimes more durable in rough conditions.
- Ports and fittings: Check port size, return flow, and diffuser features to ensure compatibility with your hydraulic or fuel system.
- Compatibility: Verify fitment with your make, model, and year using OEM references or the vehicle’s parts catalog.
- Ease of installation: Consider bracket mounting hardware and whether the product ships with necessary mounting components.
- Maintenance and service life: Look for fully welded seams and robust brackets to reduce the risk of leaks and mounting failures.
- Space for installation: Some tanks may require additional brackets or supports; plan for the surrounding components and clearance.
Frequently Asked Questions
- What type of tank is best for long-haul trucks?
– Rear-fill or large-capacity aluminum tanks are often preferred for long-haul use due to ease of refueling and extended range. - Are aluminum tanks safer than steel tanks?
– Aluminum tanks resist corrosion and are lighter, which can improve overall vehicle efficiency, while steel may offer different durability characteristics in certain environments. - Do I need special mounting hardware?
– Yes. Most tanks include specific brackets or mounting hardware; verify compatibility with your frame and requested tank type. - Can I mix hydraulic reservoirs with fuel tanks on the same chassis?
– This depends on your system design and space; ensure proper separation and routing to avoid cross-contamination and safety concerns. - How do I verify fitment for my truck model?
– Check OEM-compatible part numbers listed by the manufacturer or use the Amazon “confirmed fit” feature when available.