Kenworth T680 Fuel Tanks

Frequently Asked Questions About Kenworth T680 Fuel Tanks

What fuel tank sizes are available for the Kenworth T680, and which one should I choose?

Kenworth T680 fuel tanks typically come in 100, 120, and 150-gallon capacities. The right size depends on your hauling routes and weight considerations. Long-haul drivers often prefer dual 120-gallon or 150-gallon setups for extended range, while regional drivers may opt for 100-gallon tanks to save weight and improve payload capacity. Remember that larger tanks add weight even when empty, so consider your typical routes and fuel stop availability when making your selection.

Will aftermarket fuel tanks fit my specific T680 model year, and what modifications are needed?

Most aftermarket fuel tanks are designed to fit T680 models from 2013 to present, but mounting brackets and strap configurations can vary between model years. Pre-2017 models may require different mounting hardware than 2017+ models due to frame rail changes. Always verify your truck's specific frame rail spacing and existing bracket configuration before ordering. Some installations may require relocating DEF tanks or modifying existing brackets, particularly when upgrading from smaller to larger capacity tanks.

What's the difference between aluminum and steel fuel tanks for the T680?

Aluminum tanks are significantly lighter (approximately 50% less weight than steel), resist corrosion better, and are standard on most T680s. However, they cost more upfront and can be more expensive to repair if damaged. Steel tanks are more budget-friendly and highly durable against impact damage, but they're heavier and require regular maintenance to prevent rust. Most owner-operators choose aluminum for weight savings and long-term corrosion resistance, while some vocational applications prefer steel for its impact resistance.

How difficult is it to install replacement fuel tanks, and what tools are required?

Installing fuel tanks on a T680 typically takes 3-4 hours per tank for experienced technicians. You'll need a transmission jack or tank jack for safe handling, basic hand tools, and potentially a reciprocating saw if removing old brackets. The most challenging aspects include properly routing fuel lines, ensuring correct strap tension, and connecting sending units without damaging them. Many customers report that having a second person helps significantly with alignment. Professional installation runs $300-500 per tank but ensures proper mounting and leak-free connections.

Do aftermarket fuel tanks affect my T680's warranty or resale value?

Aftermarket fuel tanks from reputable manufacturers that meet DOT specifications typically don't void your Kenworth warranty, but always verify with your dealer first. Quality aftermarket tanks from established brands often maintain or even improve resale value, especially if you're upgrading capacity or switching from steel to aluminum. Keep all documentation and ensure professional installation to protect both warranty coverage and resale value. Tanks that don't meet original specifications or show poor installation quality can negatively impact both warranty claims and future sales.