Ready to Know How Fleet Owners Are Saving $1 per Gallon on DEF?

If you’re a fleet owner or manager still buying Diesel Exhaust Fluid (DEF) at retail prices, you might be leaving thousands of dollars on the table. DEF consumption is rising — especially with the 2027 emissions standards set to increase usage by 30–50% per vehicle. The good news? Many fleets are already saving $1 or more per gallon compared to retail by building their own DEF supply programs. In today’s article, we will break down how they’re doing it and how you can too.

DEF is used in Selective Catalytic Reduction (SCR) systems to reduce NOx emissions in diesel engines — and it’s required by law. Most trucks consume DEF at about 3–5% of their diesel fuel usage. So, if you’re running a fleet that burns 1 million gallons of diesel annually, that’s around 40,000 gallons of DEF each year. Paying $1 less per gallon quickly adds up to $40,000 in savings.

From Retail to Real Savings

Retail DEF pricing — especially for jugs at truck stops — is typically $1.00 to $1.25 per gallon higher than what bulk DEF buyers pay. The markup isn’t just about product cost; it’s about packaging, branding, and convenience. By contrast, fleets that take control of their DEF supply cut out the middlemen, avoid packaging costs, and often lock in better logistics.

Here’s how they’re doing it:

1. Build a Bulk DEF Program

Fleets that buy in bulk and store DEF on-site are in the best position to save. DEF is delivered directly to your yard in transport trucks, typically carrying about 5,200 gallons per load. It’s then stored in insulated tanks equipped with proper dispensing systems to ensure safe and efficient use. This setup can save up to $1 per gallon compared to jug or retail bulk pricing. In addition to the cost savings, it helps eliminate offsite fueling downtime and gives you full control over DEF quality and inventory management.

2 – Invest in the Right Equipment

DEF tanks, dispensers, and monitors aren’t just accessories — they’re tools to help you run a leaner operation.  Right-sized on-site storage tanks drive down DEF costs by 25%-50%, while integrated dispensers streamline fueling and reduce driver downtime. Remote monitors provide real-time inventory visibility, helping fleet managers avoid runouts and schedule timely deliveries without over-ordering. Together, these components support a more controlled, data-driven approach to DEF supply. Many suppliers offer equipment bundles or financing as part of long-term contracts, making it easier for fleets to get started without significant upfront costs.

3- Lock in Contracts Instead of Spot Buying

Spot buying leaves you vulnerable to market spikes driven by urea prices, natural gas costs, or supply chain issues. Contracting with a DEF supplier (usually 2–3 years) not only provides price stability but often unlocks equipment discounts or bundled service packages.

4. Choose a Supplier Focused on Your Needs

Not all DEF suppliers are equal. With an extensive DEF supply network, Mansfield ensures supply allocations at every primary supply point in North America. Mansfield also offers turnkey packaging solutions that can include customized private-label branding.

With a centralized command-and-control logistics model, Mansfield supports 6,000+ customer locations, delivers over 72 million gallons annually, and maintains 85+ supply points across North America.

Ready to save $1 per gallon on DEF?

Talk to your supplier about bulk delivery, on-site equipment options, and contract pricing. Or explore Mansfield’s DEF program to see how your operation can make the switch. The cleaner your emissions — and your strategy — the better your bottom line.

DEF Equipment Catalog

Looking for the right equipment for your DEF needs? With Mansfield’s DEF Equipment Catalog, you can explore a variety of DEF equipment options and request information or purchase support directly. Check out our online catalog today!