Finding a reliable fuel tank for semi trucks requires evaluating capacity, durability, and fitment with your rig. This guide highlights five top options, spanning mid-size to large-capacity tanks, plus considerations to help you choose a model that matches your hauling demands and maintenance routines. Each product is chosen for OE-style fit, robust construction, and practical features that support long-haul reliability.
Summary of Selected Products
| Product | Brand | Capacity | Main Benefit |
|---|---|---|---|
| TRQ Gas Fuel Tank | TRQ | 16 gal | Direct-fit OE replacement for several GM trucks |
| Better Built Steel Transfer Fuel Tank | Better Built | 36 gal | Large capacity with built-in baffles |
| TITAN Fuel Tanks 7020217 | TITAN Fuel Tanks | 55 gal | Mid-ship design, ample range |
| RDS MFG INC Fuel Tank | RDS MFG INC | 60 gal | Variety of capacities to fit different short beds |
| Fuel Tank Kit 19.5 Gal (Ford F-100) | Generic | 19.5 gal | Complete kit with sending unit and fittings |
TRQ Gas Fuel Tank 16 Gal
The TRQ 16-gallon fuel tank is presented as an OE replacement designed for direct fit, aligning with GM jack-of-all-trades vehicle uses. It emphasizes vehicle-specific compatibility, with reference numbers for cross-checking fit. This compact tank is suitable for installations where space constraints are a factor on light-to-medium duty applications, ensuring a clean original look while restoring fuel capacity.
Key features include direct fitment, OE-style replacement quality, and cross-reference numbers (GM11B, TAN00256) to assist with accurate identification. When considering a semi-truck or heavier hauler, verify that this tank matches the intended vehicle’s neck size, mounting points, and sending unit compatibility.
2 Pcs Upgrade Semi Truck Locking Fuel Cap Cover
While primarily a cap accessory, this locking fuel cap cover enhances security for tanks on semi trucks by defending against fuel theft. It’s compatible with Freightliner, Sterling, and Western Star Class 8 trucks, and features a high-quality lock cylinder with two keys. This accessory can be paired with larger capacity tanks to maintain secure fueling in transit and at stopovers. The upgraded design places the lock on one side to simplify operation and improve sealing, reducing leakage risks and tampering opportunities.
Better Built Steel Transfer Fuel Tank – 36-Gallon
The Better Built 36-gallon transfer tank emphasizes capacity and durability. Its rectangular shape fits a variety of trucks and trailers used in heavy-duty service, with a robust steel construction designed to withstand road vibrations and shifting contents. Notable features include overfill protection that automatically shuts off at the pump and built-in baffles that minimize movement of fuel during transport—improving stability and reducing slosh in rough conditions.
Fokes Locking Diesel Fuel Cap 2 3/8″
The Fokes locking diesel fuel cap is designed for 2-3/8″ fill necks and supports Freightliner M2 Small Semi Box Trucks with vented tanks. Its aluminum alloy construction offers corrosion resistance and longevity, paired with a dual-key locking mechanism to deter theft. A rubber seal inside helps prevent leaks after installation. This component is a practical addition to a semi-truck fuel system, especially when paired with larger-capacity tanks or extended-haul configurations where security matters.
Fuel Tank Kit – 19.5 Gallon In-Cab Non-Evap
This in-cab fuel tank kit includes a 19.5-gallon tank with sending unit, filler neck, and hose connections. It’s positioned as an all-in-one replacement option for older or classic pickups and light-duty trucks, offering a straightforward install with essential components. When used with semi-truck configurations, ensure compatibility with mounting space, movement clearance around the cab, and the truck’s existing sending unit and fuel line routing.
TITAN Fuel Tanks 7020217 XXL Replacement Diesel Tank
The TITAN 55-gallon replacement tank is designed as a mid-ship option, delivering substantial capacity without interfering with steps or air systems in many trucks. This model is engineered for compatibility with a stock sending unit and is known for straightforward installation. The 55-gallon size offers a balanced compromise between range and available space, making it suitable for longer routes or higher-mileage fleets seeking fewer refuels on the road.
RDS MFG INC Fuel Tank – 60-Gallon
The RDS MFG INC 60-gallon tank provides a large capacity option for substantial-haul operations. It is designed to fit a range of truck configurations, with attention to dimensions that suit short-bed layouts and similar chassis lengths. The product notes emphasize versatility across capacities and the importance of measuring before ordering to ensure proper fit, mounting alignment, and compatibility with existing fuel system components.
Buying Guide: Key Purchase Considerations
- Capacity and range: Choose a tank size that matches your typical routes and fuel stops. Higher capacity reduces fill frequency but requires space and mounting compatibility.
- Fitment and mounting: Verify tank neck size, mounting brackets, and clearance with exhaust, drive shafts, steps, and other components. Mid-ship designs can offer a balance between space and weight distribution.
- Material and durability: Steel tanks are strong and durable; aluminum tanks resist corrosion and may be lighter. Consider road conditions, vibration, and exposure to elements.
- Security features: Locking fuel caps and anti-theft solutions reduce theft risk in unsecured areas. Ensure compatibility with your tank’s neck size and locking mechanism.
- Do-it-yourself vs. professional installation: Some tanks and kits are straightforward for experienced DIY installers, while others may require professional mounting and venting considerations.
- Sending unit compatibility: If reusing an existing sending unit, confirm that the new tank is compatible or that an appropriate sending unit is included or available.
- Ventilation and emissions: Some tanks require venting or match specific emissions standards. Ensure compatibility with regulatory requirements for your region and operation.
- Warranty and support: Check manufacturer warranties and availability of replacement parts, mounting hardware, and seals to ensure long-term serviceability.