Bulk DEF Fluid distributor in Southern Wisconsin

API Certified Diesel Exhaust Fluid (DEF)

At Brown Oil Co, we know how critical Diesel Exhaust Fluid (DEF) is for today's diesel-powered fleets, and we strive to simplify how you receive and manage your supply. DEF is essential for reducing emissions in diesel vehicles, as mandated by the EPA's 2007/2010 Diesel Emissions Standards, and is vital for operating heavy machinery, farm equipment, and locomotives. Insufficient DEF levels can cause diesel engines to shut down and may void equipment warranties. We offer a comprehensive DEF solution with a variety of packaging options, including cases, totes, drums, or bulk delivery, with next-day service throughout Southern Wisconsin. Our team is available 24/7 to answer your calls and ensure timely delivery. For more information or to schedule a delivery, call us at (608) 752-7696.

DEF Packaging Options

• Cases
• Totes
• Drums
• Bulk Delivery

Diesel Exhaust Fluid (DEF) FAQ

What is Diesel Exhaust Fluid (DEF) and what is it used for?

DEF is a non-toxic, colorless liquid composed of 32.5% urea and 67.5% deionized water. It is used in Selective Catalytic Reduction (SCR) systems in diesel engines to reduce harmful nitrogen oxide (NOx) emissions. DEF helps convert these pollutants into harmless nitrogen and water, making diesel engines more environmentally friendly.

How often do I need to refill DEF in my vehicle or equipment?

The frequency of DEF refills depends on the size of the DEF tank and the fuel consumption of the vehicle or equipment. On average, DEF consumption is approximately 2-3% of diesel fuel usage. For example, if a truck uses 100 gallons of diesel, it would typically require about 2 to 3 gallons of DEF.

What happens if a diesel engine runs out of DEF?

If a diesel engine runs out of DEF, the vehicle’s SCR system will reduce engine power to comply with emission regulations. In some cases, the engine may not restart after being turned off until DEF is replenished. Running out of DEF can also lead to potential damage to the engine and exhaust system, and may void certain warranties.

How should DEF be stored and handled?

DEF should be stored in a cool, dry place away from direct sunlight and extreme temperatures to maintain its quality and effectiveness. The ideal storage temperature for DEF is between 12°F (-11°C) and 86°F (30°C). It is also important to use clean containers and equipment to avoid contamination, which can affect the performance of the SCR system.

What packaging options are available for DEF, and which one is right for my needs?

DEF is available in various packaging options, including 1-gallon jugs, 2.5-gallon containers, 55-gallon drums, 275-gallon totes, and bulk delivery. Smaller containers are ideal for light-duty vehicles and on-the-go refills, while larger drums and totes are more suitable for heavy-duty fleets, construction sites, and agricultural operations that require a higher volume of DEF.

Can I use water or other substances instead of DEF in my vehicle?

No, you should never substitute DEF with water or any other fluid. The SCR system in diesel engines is specifically designed to use DEF to reduce emissions. Using anything other than DEF can cause serious damage to the system, void warranties, and lead to significant repair costs. Always use DEF that meets ISO 22241 standards to ensure compatibility and quality.