Freightliner FLC112 Fuel Tanks

Frequently Asked Questions About Freightliner FLC112 Fuel Tanks

What size fuel tanks fit the Freightliner FLC112, and how do I determine the right capacity?

The FLC112 typically accommodates fuel tanks ranging from 50 to 150 gallons, with 100-gallon and 120-gallon tanks being the most common sizes. To determine the right capacity, measure your existing tank brackets (standard spacing is 23 to 26 inches) and consider your typical route distances. Long-haul drivers often prefer dual 120-gallon setups, while regional operators may find 100-gallon tanks sufficient. Always verify your frame rail configuration before ordering, as some FLC112 models have modified mounting points.

Are these fuel tanks compatible with all FLC112 model years?

Most aftermarket fuel tanks fit FLC112 models from 1988 to 2003, but there are important variations. Pre-1995 models may require different strap configurations, while 1996 and newer models typically use standardized D-ring style mounts. Tanks are generally interchangeable within these year ranges, but always check the mounting bracket style (strap-mount vs. bracket-mount) and step configuration. Models with aftermarket exhaust systems or modified frames may need additional adapters.

What material options are available, and which is best for my application?

Fuel tanks for the FLC112 come in aluminum and steel options. Aluminum tanks (typically 0.125-inch thick) are 65% lighter than steel, resist corrosion better, and are ideal for weight-conscious operations. Steel tanks (14-gauge minimum) cost about 30% less and offer superior impact resistance, making them suitable for construction or logging applications. Both materials meet DOT specifications, but aluminum tanks generally provide better long-term value through weight saOEMgs and longevity.

Can I install these fuel tanks myself, or do I need professional installation?

Installation typically takes 2-4 hours per tank and requires basic mechanical skills. You'll need standard tools plus tank straps, mounting hardware, and fuel line fittings (often sold separately). The main challenges include properly aligning the tanks with existing fuel lines, ensuring adequate ground clearance (minimum 12 inches), and correctly torquing strap bolts (typically 35-45 ft-lbs). While DIY installation is possible, professional installation is recommended if you're modifying fuel lines or relocating tanks from their original position.

Do these tanks come with steps, and what finish options are available?

Tank step configurations vary widely. Plain tanks without steps are the most economical, while tanks with integral steps add convenience but cost 15-25% more. Step options include single-step, double-step, and full-length designs. Finish options include mill finish aluminum (most common), polished aluminum, painted steel (black or white), and powder-coated finishes. Polished aluminum requires regular maintenance to maintain appearance, while painted finishes offer better corrosion protection but may chip over time. Most tanks include mounting hardware but check if fuel senders, caps, and vents are included or sold separately.