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Protecting Diesel Exhaust Fluid

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Diesel Exhaust FluidDiesel exhaust fluid (DEF) is inseparable from diesel cars these days. Car manufacturers started using Selective Catalytic Reduction (SCR) systems for their diesel cars in 2010 to cut down on hazardous nitrogen oxide emissions. In these SCR systems, DEF is used to break the NOx emissions down into harmless nitrogen and water.

DEF and Diesel

When you purchase a diesel car, you will undoubtedly encounter and handle DEF. You can find diesel exhaust fluid for sale in truck stops, gas stations, and even Walmart. Usually, DEF in these places will be sold in gallon jugs. You can buy DEF, however, in large containers or drums.

Usage and Storage

DEF is a mixture of water and urea. You can easily handle it. It is also non-hazardous; you won’t have to worry if some fluid gets on your hands. You may need some help in storing and maintaining the quality of DEF, however. Here are some tips you can follow.

Winter and Freezing

For one, you should keep in mind that DEF freezes in winter when temperatures drop down to 12 degrees Fahrenheit. When the winter season gets extremely cold, you can stay at home instead of going out a lot to keep your DEF from freezing.

Expansion and Protection

With DEF freezing in mind, another good tip is to keep from filling up the DEF tank fully. According to experts, DEF expands when it freezes. Giving some space for the DEF to expand can protect the tank.

Temperature and Control

A third but quick tip is to store DEF jugs and containers inside temperature controlled garages, rooms, or storage spaces. In this way, the DEF you are keeping in store will not freeze.

Lifespan and Prolonging Tips

Lastly, do not store DEF for too long. When conditions are favorable, DEF can last for a year but not more than that. To ensure this happens, store DEF in a proper container, away from direct sunlight, and in temperatures between 12 and 86 degrees Fahrenheit.

There are other tips you can follow when handling DEF, but these four are the most basic and most essential ones. Follow them strictly, and you will enjoy your diesel car.


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