How Much Diesel Exhaust Fluid Do You Need?

DEF Over the last decade, diesel exhaust fluid (DEF) has quickly become a necessity for the modern transportation fleet. In 2010, the EPA passed more stringent emission standards to reduce the release of NOx and particulate matter from middle- and heavy-duty vehicle engines. At that time and years that followed, selective catalytic reduction (SCR) and DEF helped many diesel-fueled industries meet those standards. In 2014, DEF became even more nationally prevalent when the EPA required off-road equipment manufactured in 2014 and after to use DEF.
If you’re unsure of how much DEF packaging you need for your vehicles and other equipment, keep reading for a couple suggestions and recommendations to purchase the right amount.

How to Estimate How Much You Need

Many DEF suppliers provide online DEF usage calculators to give you an accurate projected amount for your vehicles or equipment. Typically, the estimated amount is calculated using four factors:

  • Number of automobiles in the fleet
  • Average miles per vehicle
  • Average miles per gallon
  • DEF usage rate

The most critical factor you must take into consideration is the rate of DEF your vehicles are using. Most manufacturers of heavy-duty vehicle engines equipped with SCR aftertreatment suggest a usage rate of 3%; in other words, 3 gallons of DEF are used for every 100 gallons of fuel.

It’s recommended that drivers of highway-traveling trucks should refill the DEF tank for every three diesel refills. For smaller vehicles, the DEF tank can be refilled with every oil change. Regarding heavy-duty automobiles, the required amount can be difficult to estimate due to engine configurations, idling times, and the weight of the load being transported.

How to Manage DEF Consumption

For a small fleet of three or four vehicles, a 55-gallon drum should suffice, and larger fleets (10 or more) should require at least one or two 330-gallon totes. Over time, your use of DEF will give you an accurate value of a weekly average use of DEF.

If you are not sure about your exact needs, many DEF suppliers can help you in your estimation and management plan.

Have Questions About Diesel Exhaust Fluid? Visit the Blue Sky Booth at the Gulf Coast Food & Fuel Expo.

Blue Sky will be exhibiting at the Gulf Coast Food & Fuel Expo, March 14-15, 2018. We invite you to stop by booth #831 and speak with one of our DEF experts. Discover for yourself why Blue Sky DEF is The Clear Choice for Clean Air.

The Gulf Coast Food & Fuel Expo will combine the traditional trade shows of the Petroleum & Convenience Marketers of Alabama, the Louisiana Oil Marketers and Convenience Store and Mississippi Petroleum Marketers and Convenience Stores . The 2018 Gulf Coast Food & Fuel Expo will take place on March 14-15 at the Mississippi Coast Coliseum and Convention Center in Biloxi, Mississippi, with housing available at the beautiful Beau Rivage Resort and Casino. The Gulf Coast Food & Fuel Expo will not only feature a large regional tradeshow, but also educational sessions, networking events, brand meetings, cocktail reception, and a golf tournament open to attendees and exhibitors.

Speak With One of Our Diesel Exhaust Fluid Experts at MPACT

Blue Sky DEF is thrilled to be exhibiting at the MPACT Show in Indianapolis, Indiana. We invite you to stop by booth #1924 and speak with one of our DEF experts. Discover for yourself why Blue Sky DEF is The Clear Choice for Clean Air.

The M-PACT Show is the largest gathering place in the Midwest for energy and convenience industry leaders. Each spring, the M-PACT Show brings together more than 4,500 professionals representing the entire spectrum of today’s diverse energy and convenience supply chain.

The premier regional tradeshow welcomes participants from Illinois, Indiana, Kentucky, Ohio and 400+ Midwest cities. Featuring nearly 600 exhibitors showcasing the latest products, services and technologies, plus a full slate of thought-provoking educational sessions presented by the industry’s most skilled trainers, The M-PACT Show delivers participants a unique, once-a-year opportunity to propel their careers—and their businesses—forward.

What Is SCR Technology?


If you’ve never heard of selective catalytic reduction (SCR), you are most likely not alone. As a feature of industrial boilers and diesel engines, it goes somewhat unheard of in the United States; however, its effects are worthy of notice and praise. As a result of SCR, NOx reduction efficiency rates, as well as the reduction efficiency rates of other harmful pollutants, are significantly higher. Read on for a full description of the process and its impacts and applications.

What Is Selective Catalytic Reduction?

Selective catalytic reduction is an active emissions regulating technology system applied to diesel engines that converts NOx into safe, breathable molecules. This chemical conversion is initiated using a catalyst and a liquid-reductant agent. The most commonly used reductant source is automotive-grade urea, also referred to as diesel exhaust fluid (DEF).

When directed onto an SCR catalyst, DEF is converted into ammonia, which reacts with NOx to create nitrogen, water, and small amounts of CO2. This chemical reaction is dependent on an SCR catalyst, which provides the required oxidizing atmosphere that permits nitrogen oxide reduction to take place.

Why Is SCR Critical?

Alone, SCR NOx emission controls can reduce up to 90 percent of NOx from diesel engine exhaust fumes; however, it does more than reduce NOx. A cost-effective and fuel-efficient technology, it can also prevent high amounts of other harmful diesel emissions, such as particulate matter (PM) by 30 to 50 percent and hydrocarbons by 50 to 90 percent. When integrated with a diesel particulate matter filter, SCR can cut PM by an even higher percentage.

What Are Its Applications?

Before its widespread application into diesel passenger vehicle engines, SCR technology was integrated into industrial boilers to reduce stationary source emissions. It was also used in large marine vessels, such as ferries and cargo vessels. When the EPA revised its emission standards for heavy-duty vehicles and Tier 4 emissions in 2010, SCR helped successfully meet the stringent requirements.

How to Determine the Quality of Diesel Exhaust Fluid


One of the factors that you have to explore even more than diesel exhaust fluid prices is the quality of the product you’re buying. Getting a great deal per gallon will end up being a problem in the long run if the quality is less than you’re expecting. There are several tests that diesel exhaust fluid goes through to make sure that the quality is where it should be at for your systems.

Determining the Quality

Diesel exhaust fluid has a standard set by ISO 22241-1 and other guidelines to ensure that you’re receiving the best quality possible. An open line of communication between you and your supplier is essential when it comes to determining the quality of your diesel exhaust fluid. You’ll want to inquire what analysis and testing are done on their products during the production process. You can ask if they are an API recommended Analytical Supplier which requires them to have the full amount of testing and analysis to qualify for the certification and licensing required by API. When corners are cut by testing and analysis not be completed, there’s a good chance that you may be rolling the dice when it comes to the quality you’re receiving.

Why Is Quality Important?

The selective catalytic reduction technology that works to reduce the oxides in the exhaust cannot handle impurities in the diesel exhaust fluid. Contaminants and other pollutants in a poor quality fluid can eventually cause it to malfunction or ultimately fail. This can lead to some big repair bills and other issues. Going through your due diligence to make sure that your supplier rigorously tests their product is the best way to ensure that you’re protecting your investment.

Not only should you consider diesel exhaust fluid price per gallon, but the diesel exhaust fluid quality, as well. At Blue Sky Diesel Exhaust Fluid, we understand that the quality of our product has an impact on your company, and that drives us to provide you with the best quality possible. Have a question about our quality control standards or testing? Contact us today to learn more. Our knowledgeable staff can help you.

The Facts about Diesel Exhaust Fluid

In an effort to reduce emissions and promote healthier air quality, DEF is recommended for all diesel vehicles. DEF, or diesel exhaust fluid, is a non-toxic solution made up of urea and de-ionized water. When combined with the exhaust stream from a diesel vehicle, it breaks down emissions, transforming them into nitrogen and water. Without this valuable solution, the emissions produced by vehicles would increasingly compound, putting the atmosphere, and human life, at risk.

DEF was introduced as a marketable product in 2010. After the EPA standards were revised to reduce harmful pollutants, DEF was used as a way to reduce pollution while still promoting vehicle efficiency. While most car manufacturers have made adjustments to their engines in an effort to reduce diesel emissions, DEF can still help.
Most diesel-powered vehicles can benefit from DEF. If your vehicle was manufactured after 2014, there’s a good chance that it requires DEF in order to function properly. Trucks, industrial trucks, vans, and certain luxury cars should all be maintained with DEF to ensure efficiency.

Now, most diesel vehicles have a dedicated storage tank to hold DEF. Typically located next to the fuel tank; the nozzle for DEF is much smaller than the fuel tank, making it difficult to mix the two up. Simply refill the tank as needed to reduce your emissions and keep your engine running smoothly.

Many assume that DEF is a toxic substance that can cause major health issues when handled incorrectly. In all actuality, DEF is completely non-toxic, non-flammable, and non-hazardous. It’s safe for transport and poses no risk if it comes in contact with skin. While it may not be toxic, it’s extremely important to prevent contamination. Even a single teaspoon of salt could destroy the purity of 5,000 gallons of DEF. Take necessary measures to store and refill your DEF properly.

Blue Sky Diesel Exhaust Fluid is proud to manufacture and supply only the purest DEF. Because our customers are our main concern, our prices and purity are always competitive. Along with our low prices, our accountability to the environment remains a top priority. We are constantly striving to find new ways to manufacture this necessary fluid without disrupting environmental resources.

Make the switch to Blue Sky Diesel Exhaust Fluid today by visiting