When you're clocking serious miles, your fuel tank isn't just a partâit's your lifeline. Keep your Kenworth fueled and running strong with our selection of heavy-duty aftermarket fuel tanks built to handle the demands of real-world trucking.
Whether you're running a T680, W900, T800, or another Kenworth model, we've got replacement and upgrade options that fit your rig, your routes, and your goals.
Why Upgrade Your Kenworth Fuel Tank?
Old or damaged tanks can cause leaks, downtime, and lost revenue. A new aftermarket tank gives you:
â Increased fuel capacity (60â150 gallons)
â Less downtime with longer range between fill-ups
â Lightweight aluminum or rugged steel construction for durability
â Integrated baffles for stability and siphon protection
â Better fitment with center-fill, rear-fill, or side-fill styles
Whether you're running long-haul loads or local freight, the right tank setup can improve efficiency, reduce fuel stops, and boost your bottom line.
Reliable Parts from Trusted Aftermarket Brands
We carry top-tier tanks and accessories from manufacturers who know the demands of commercial trucking. These tanks are designed to meet or exceed OEM standardsâwith exact-fit replacements and upgraded tank kits available.
Need extras? Add brackets, straps, step kits, or tank wraps for a polished, functional finish.
Enhance Your Entire Fuel System
Whether you're replacing a worn-out tank or upgrading for better performance, you can count on our Kenworth aftermarket fuel tanks to deliver the strength, safety, and style your truck deserves. While you're replacing your tank, it's the best time to check the structural integrity of your
Kenworth frame and chassis, optimize your nearby
exhaust components, and swap out
fuel tank hoses and lines.
Hit the road with confidenceâshop Kenworth fuel tanks at 4 State Trucks today.
Frequently Asked Questions About Kenworth Fuel Tanks
What fuel tank sizes are available for my Kenworth truck model?
Kenworth fuel tanks typically range from 50 to 150 gallons, with the most common sizes being 75, 100, 120, and 150 gallons. For W900 models, dual 120-gallon or 150-gallon setups are popular, while T680 and T880 models often use 100 or 120-gallon configurations. Tank diameter varies between 23, 25, and 26 inches depending on capacity. Always verify your frame rail spacing and wheelbase before ordering, as these factors determine maximum tank size compatibility.
Will aftermarket fuel tanks fit my specific Kenworth year and model?
Most aftermarket fuel tanks are designed to fit multiple Kenworth models from 1985 to present, including W900, T800, T880, T680, and T660 series. However, mounting strap spacing and step configurations vary by year. Pre-2007 models typically use 14-inch strap spacing, while 2008 and newer models use 16-inch spacing. EPA-compliant models (2011+) may require additional venting modifications. Check your existing tank's mounting dimensions or contact us with your VIN for exact fitment verification.
What is the difference between aluminum and steel fuel tanks?
Aluminum tanks are 65% lighter than steel equivalents, improving fuel economy and payload capacity. They resist corrosion better and typically last 15-20 years with proper maintenance. Steel tanks cost 30-40% less upfront but are prone to rust, especially in salt-belt states, and usually need replacement after 8-10 years. Aluminum tanks feature welded construction while steel tanks use crimped seams. Most owner-operators prefer aluminum for long-term value, while fleet operators sometimes choose steel for lower initial investment.
Can I install a fuel tank myself or do I need professional installation?
While experienced mechanics can install fuel tanks themselves, professional installation is recommended due to DOT regulations and safety requirements. Installation typically takes 3-4 hours per tank and requires proper lifting equipment, torque specifications for mounting straps (45-55 ft-lbs), and correct fuel line routing. You must also ensure proper grounding, install new fuel sending units if needed, and verify crossover line compatibility on dual tank setups. Many states require certified installation for warranty and inspection purposes.
What finish options are available and which holds up best?
Fuel tanks come in three main finishes: polished aluminum, brushed aluminum, and powder-coated steel. Polished aluminum provides the classic chrome-like appearance but requires monthly polishing to maintain shine. Brushed aluminum offers a maintenance-free satin finish that hides minor scratches and water spots. Powder-coated steel tanks are available in black or custom colors but can chip from road debris. For harsh climates and minimal maintenance, brushed aluminum is most practical, while polished aluminum remains popular for show trucks and owner-operators who prioritize appearance.
