Choosing the right fuel tank is essential for semi trucks, balancing capacity, safety, and reliability. The following selections cover a range of capacities and features from trusted brands, helping you compare options at a glance. This guide highlights fitment, construction, and practical benefits to help you pick a tank that matches your truck’s needs and your maintenance routine.
| Product | Brand | Capacity | Key Benefit |
|---|---|---|---|
| TRQ Gas Fuel Tank 16 gal | TRQ | 16 gal | Direct fit, OE replacement |
| Better Built 36-Gallon Tank | Better Built | 36 gal | Built-in baffles, spill prevention |
| TITAN 55-Gallon Tank | TITAN Fuel Tanks | 55 gal | Mid-ship, compatible with OE systems |
| RDS MFG INC 60-Gallon | RDS MFG INC | 60 gal | Variety of capacities, aftermarket options |
| Fokes Locking Diesel Cap | fokes | 2-3/8″ neck cap (fitment varies) | Locking protection, corrosion resistant |
TRQ Gas Fuel Tank 16 gal — Direct Fit OE Replacement
This TRQ fuel tank is designed for a direct fit on compatible GM trucks and commercial applications. It’s marketed as an OE replacement, aimed at restoring factory fuel capacity and performance without requiring major modifications. The listing notes vehicle-specific fitment and references GM part numbers, helping confirm compatibility before purchase.
Features include a straightforward installation and a focus on maintaining original driving ranges. Prospective buyers should verify exact fitment for their semi or light-commercial fleet using the listing’s compatibility information to prevent mismatches. This tank suits projects where a compact capacity is sufficient or where space constraints exist in the chassis design.
2 Pcs Upgrade Semi Truck Locking Fuel Cap Cover
This locking fuel cap set provides anti-theft protection with a high-quality lock cylinder and two matching keys. The design emphasizes ease of use, with an updated locking mechanism placed for easier access. The cover is described as tighter and safer during operation, aiding secure fueling for Freightliner, Sterling, and Western Star Class 8 trucks. Confirm year and model compatibility to ensure proper fitment.
Better Built Steel Transfer Fuel Tank — 36-Gallon
The Better Built 36-gallon rectangular tank offers a larger capacity than compact tanks, with an automatic overfill shutoff to prevent spills at the pump. Built-in baffles enhance rigidity and reduce shifting during transport, improving stability and safety when navigating road conditions or sudden maneuvers. This tank is suitable for fleets needing extra range without a full-size trunk replacement.
Fokes Locking Diesel Fuel Cap 2 3/8″ — Freightliner M2
This locking cap is designed for a 2-3/8″ fill neck, with corrosion-resistant die-cast aluminum and a secure locking mechanism. The rubber seal reduces leakage risk, and the set includes a high-quality lock cylinder with keys. It’s described as compatible with Freightliner M2 small semi box trucks, though buyers should verify the exact neck size and venting requirements for their fuel system.
Fuel Tank Kit — 19.5 Gallon In-Cab (Ford F-Series)
This in-cab kit includes a 19.5-gallon fuel tank with sending unit, filler neck, and hose. It’s described as a replacement option for 1961-1972 Ford F-100 pickups, suggesting utility in classic or smaller commercial applications where an in-cab tank is appropriate. Fitment relies on model-specific geometry, making verification essential before ordering.
TITAN Fuel Tanks 55-Gallon — Crew Cab, Short Bed
The TITAN 55-gallon tank expands capacity compared to standard 34-40 gallon OEM tanks, offering more range between fills. It’s designed as a mid-ship, direct replacement that minimizes interference with steps, airbags, or other underbody components. The tank aims to maintain OE sending unit compatibility while supporting fleet-wide needs for longer trip ranges.
2 Pcs Upgrade Semi Truck Locking Fuel Cap Cover — Kenworth, International, Mack, Volvo
This two-pack offers anti-theft locking caps suitable for multiple heavy-duty brands, including Kenworth, International, Mack, and Volvo. The set emphasizes rust resistance and a robust zinc alloy construction with polished coating for longevity. As with other caps, verifying fill neck size and model compatibility is recommended to ensure a proper seal and security.
Buying Guide: Key Considerations For Semi Truck Fuel Tanks
- Capacity versus vehicle weight: Larger tanks increase range but add weight. Balance needed payload and legal weight limits against fuel range requirements.
- Fitment and mounting: Tanks must fit under the frame and clear exhaust, steps, and suspension components. Verify OEM part numbers, and check for mid-ship vs. rear-mill placement.
- Material and durability: Steel tanks are sturdy and corrosion-resistant with proper coating; aluminum tanks save weight but may require different mounting hardware.
- Safety features: Built-in baffles reduce fuel slosh, and automatic overfill shutoffs prevent spills. Consider tanks with tested leak prevention and robust mounting brackets.
- Compatibility with sending units: Many tanks are designed to work with OE sending units. Confirm electrical compatibility and fuel gauge accuracy after installation.
- Cap security: Locking caps deter theft and contamination. Ensure the cap neck size matches your fuel system and that keys are included or easily replaced.
- Maintenance access: Choose tanks with accessible drain plugs or clean-out features for long-term serviceability.
- Installation ease: Some tanks are direct-fit OE replacements; others may require adapters or additional hardware. Assess your shop capabilities and any need for professional installation.
- Cost versus longevity: Higher-capacity or multi-use tanks can offer long-term savings through fewer fills and reduced freight stops. Weigh upfront cost against lifecycle value.