White vans Booster truck fuel professional construction cone
White vans Booster truck fuel professional construction cone

Protect Your Fleet with Diesel Exhaust Fluid Delivery

Diesel Exhaust Fluid (DEF) delivery lets you protect the performance of your diesel fleet and lower your emissions without disrupting your day-to-day operations.

What is Diesel Exhaust Fluid &
Why Do We Use It?

DEF is a liquid mixture of 32.5% high-quality urea and 67.5% deionized water used in the Selective Catalytic Reduction (SCR) system of diesel engines. Since 2007, Selective Catalytic Reduction systems have become standard in diesel engine trucks. The SCR injects DEF into the exhaust system by a controlled dosing module so it can react with and neutralize harmful NOx molecules in diesel exhaust, converting them to nitrogen and water vapor and cutting the harmful emissions of your fleet.

3-5% Better Fuel Efficiency
by Using DEF
5% Fuel Savings due to
Better Fuel Efficiency
80% Reduction in
NOx emissions

What Does DEF Do for Your Diesel Fleet?

DEF optimizes your engine’s ability to burn fuel by cutting harmful emissions (and the soot it leaves behind). When the DEF vapor hits your exhaust system, it reacts with the nitrogen oxide (NOx) that burning diesel produces and changes it into harmless water and nitrogen vapor.


Topping up your DEF tank on every 3rd or 4th diesel refuel helps to:

  • Burn diesel more efficiently due to less build-up in the exhaust pipes

  • Curtail smog formation and prevent respiratory ailments

  • Stay compliant with local and national emission regulations

masked Booster fueling professional dragging hose to white van

Operational Benefits of Using DEF

Our commitment to convenience is reshaping the landscape of vehicle maintenance so that our clients can ensure compliance with local, state, and national emission regulations without losing operational efficiency or budget. Add DEF to your fleet operations to see:

  • Higher Fuel Efficiency

    Your refueling costs will be lower with fewer deliveries needed.

  • Lower Maintenance & Repair Frequency

    Your fleet engines stay cleaner, lengthening usability without repairs and replacement needed. Bonus: They stay in operation, maximizing productivity.

  • Stronger Regulatory Compliance

    Your fleet can reduce NOx emissions by as much as 80%. Vehicles with SCR can run without DEF but may not not be emission standard-compliant, and you could be at risk.

  • Better Community Relations

    Your trucks will no longer be the source of disruptive exhaust sights and smells.

How We Deliver DEF to You

Most trucks with SCR have easy-to-read gauges so drivers know when to refill DEF tanks to stay emission compliant. On average, DEF tanks need to be refilled after 3-4 diesel tank refills.

We provide high-quality DEF with stringent quality control measures to our clients in two container types so that your team can administer it to vehicles as needed.

dark purple pallet icon
DEF Tote Delivery & Refilling On-site, self-service Diesel Exhaust Fluid dispensing container, refilled by Booster.
dark purple DEF jug icon
DEF Jug Delivery Pallet of Diesel Exhaust Fluid jugs continuously replaced by Booster and easily dispensed by your team.

Schedule your DEF to be delivered alongside your regular fuel deliveries from Booster.
Learn more about our fuel delivery services and options.

Our Fuel Delivery Service

Ready to Add DEF to the Mix?

If your team is ready to add DEF delivery to your fueling program, talk to a Booster representative today. 

  • Evaluate Your Fleet

    Our team will evaluate your equipment for compatibility and your site for the best delivery option for your team

  • Optimize Your Plan

    We will help you determine DEF delivery frequency needs based on your fleet fueling needs

  • Start Fueling

    Get your first Boost and unlock your Booster Customer Dashboard to monitor your diesel usage, changing fuel efficiency with DEF added, and emissions as they lower

Get Started
Booster delivery driver leaning on Smart Tanker open door