Diesel Exhaust Fluid

Your DEF Headquarters

We can deliver to you your Diesel Exhaust Fluid in 2, 2.5 Gallon Cases, 55 Gallon Drums, 330 Gallon Totes and in bulk.

Englefield Oil can also include Diesel Exhaust Fluid though our On-site Fleet Fueling Program.

Don’t forget that we can also help with pumps and storage solutions.

DEF Calculator

What is Diesel Exhaust Fluid (DEF)?

Diesel exhaust fluid (DEF) is a urea-based solution that reduces harmful nitrogen oxide emissions from diesel engines. DEF for on/off highway use is composed of 32.5% high-purity urea and 67.5% deionized water. DEF is clear, odorless and safe to handle.

The solution is added to a separate storage tank on newer diesel-powered vehicles equipped with selective catalytic reduction (SCR) technology. The fluid is injected into the hot exhaust stream of the vehicle and helps break down the nitrogen oxide gases in the exhaust into nitrogen gas and water vapor, both harmless to the environment.

Why Use DEF?

It is an inexpensive and efficient option for lowering NOx emissions. Nitrogen oxide (NOx) is produced from the exhaust of diesel vehicles and is a major contributor to smog and other air pollution. Exposure to NOx can also lead to respiratory and heart disease. This is why in 2010, the U.S. Environmental Protection Agency (EPA) mandated that all new diesel engine vehicles reduce NOx emission levels by 90%.

It improves engine performance and fuel efficiency. The combination of DEF and SCR technology not only reduces NOx emissions, it actually improves a vehicle’s horsepower by making diesel engines run more efficiently, resulting in fuel savings of up to 8%.

It is easy to use. Any diesel vehicle with SCR technology can use DEF. There are no special filters or absorbers required. A gallon of diesel exhaust fluid will generally last about 300-500 miles. And since the EPA regulations came into effect, SCR technology is quickly becoming the industry-standard on new diesel vehicles.

Have questions, contact us today to learn more or get a quote.

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Englefield Oil Co.

Established in 1961 by FW Englefield III, we welcome customers like we do our own family, building lasting relationships while getting to know you and your business personally.

It’s this approach that gives your business the personal touch it deserves. Because it’s not just getting you the right products, it’s about providing you the right value.


119 Duchess Stores

Englefield Oil Co. Currently operates 119 Duchess Convenience Stores and BP fuel sites

7 Fast Food Franchises

4 Taco Bell; 2 Subway; 1 Long John Silvers

7 Commercial Stations

Englefield Oil Co. operates 7 commercial unattended fueling stations


4 Bulk Warehouses

Englefield Oil Co. currently utilizes 4 bulk/packaged lubricant warehouses sites

100+ Vehicles

100+ vehicles are currently available to service our customers

1,500 Employees

More than 1,500 individuals are employed by Englefield Oil Co.