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Everything You Should Know about Diesel Exhaust Fluid

Diesel Exhaust Fluid (DEF) refers to a high quality operating fluid that is employed in combination with diesel vehicles and selective catalytic reduction (SCR) technology. It is a 32.5% solution of high-purity, synthetically created, urea in de-mineralized water. It is placed into a separate tank on the truck, and is simple to handle, non-toxic and safe for use. Diesel Exhaust Fluid (DEF) consumption is computed as a ratio of diesel fuel use, also called as the “dosing rate” or “treat rate”. Medium- and heavy-duty vehicles normally have a dosing rate of 2-3%. Here are some of the most important things that you should know about diesel exhaust fluid.

Functions of DEF

Majority of the diesel-powered on-road vehicles manufactured since 2010 make use of SCR technology and require DEF. Several examples are heavy-duty trucks, diesel pick-ups, delivery vans, and European luxury cars. Diesel powered off-road equipment such as those utilized in agricultural and construction has been required to use SCR technology since 2014.

Keeping DEF Pure

DEF purity is critical. One significant factor consideration in preserving DEF purity and quality is the kind of dispensing system employed. Closed system containers feature a valve coupling system that fortifies the container opening on drums and totes (IBC) to prevent debris, dirt, bugs, etc from coming into the container and contaminating the DEF. By contrast, open system containers are drums or totes that do not include a valve insert in the container’s opening, which means that dirt or debris can infiltrate the container and contaminate the DEF.

Where to Find DEF?

In view of the fact that nearly all diesel-powered passenger cars and trucks produced since 2010 are provided with Selective Catalytic Reduction (SCR) and require DEF, it is available for purchase at most fueling stations. Truck stops also normally have a DEF pump right on the fuel island. You can also buy DEF at most OEM shops, as well as other dealers and distributors.

Running Low on DEF

The EPA mandates all truck manufacturers to integrate some kind of staged warning system (some offer actual gauges) to make the driver know about exactly how close to empty the system is. Whether a vehicle goes into a “limp home” or diminished engine power or restricts the number of times you can turn the engine on relies on the particular car or truck model, but at some point it will not start. To put it simply, you should treat your DEF tank the same way you treat your fuel tank; you surely do not want to leave yourself stranded because you failed to notice the indicators.