Mack CX Truck Fuel Tanks

Frequently Asked Questions About Mack CX Truck Fuel Tanks

What size fuel tanks are available for Mack CX trucks, and how do I determine which capacity I need?

Mack CX fuel tanks typically range from 50 to 150 gallons, with 100-gallon and 120-gallon options being the most common. To determine the right capacity, consider your typical routes and fuel consumption. For regional hauling, 100-gallon tanks often suffice, while long-haul operations benefit from 120-150 gallon tanks. Remember that dual tank setups are popular for extended range - many drivers opt for matching 120-gallon tanks on each side for balanced weight distribution and maximum capacity.

Will these fuel tanks fit my specific Mack CX model year, and what are the mounting differences?

Mack CX fuel tanks are generally compatible with CX Vision models from 2000-2007 and CX613 models from 2001-2007. However, mounting brackets and strap configurations can vary between early models (2000-2003) and later models (2004-2007). The main difference lies in the strap mounting points - earlier models use a 3-bolt pattern while later models typically use a 4-bolt pattern. Always verify your truck's VIN and model year before ordering, as some mid-year production changes may affect fitment.

Are these aluminum or steel tanks, and which material is better for my application?

Both aluminum and steel fuel tanks are available for Mack CX trucks. Aluminum tanks are lighter (reducing overall vehicle weight by 40-60 pounds per tank), resist corrosion better, and are ideal for weight-sensitive applications or coastal regions. Steel tanks are more economical, offer better impact resistance, and are easier to repair if damaged. Most over-the-road drivers prefer aluminum for the weight savings and longevity, while construction and vocational trucks often use steel tanks due to their durability in harsh environments.

What additional parts do I need for installation, and can I install these myself?

A complete fuel tank installation requires tank straps, mounting brackets, fuel sending unit, filler neck and cap, vent line, and fuel line connections. Many tanks come as bare units without these components. Installation typically takes 3-4 hours per tank for experienced mechanics. While DIY installation is possible, you'll need proper lifting equipment, basic hand tools, and the ability to safely disconnect and reconnect fuel lines. Professional installation is recommended if you're not comfortable working with fuel systems, as improper installation can lead to leaks or tank damage.

Do these replacement tanks come with the same step and grab handle configurations as OEM?

Most aftermarket Mack CX fuel tanks come with provisions for mounting steps and grab handles, but the actual steps are typically sold separately. OEM-style three-step configurations are available, as well as aftermarket options with anti-slip surfaces. When ordering, specify if you need a "step tank" versus a "smooth tank" configuration. Step mounting brackets are usually welded to the tank, so this decision must be made at the time of purchase - you cannot easily add steps to a smooth tank later.