If You Read One Article About Cars, Read This One

Posted on Posted in Auto & Motor

What You Need to 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 filled into a separate tank on the car, and is simple to manage, non-toxic and safe for use. Diesel Exhaust Fluid (DEF) consumption is calculated as a ratio of diesel fuel use, also referred to as the “dosing rate” or “treat rate”. Medium- and heavy-duty vehicles typically 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

Most diesel-powered on-road vehicles manufactured since 2010 employ SCR technology and require DEF. A few examples are heavy-duty trucks, diesel pick-ups, delivery vans, and European luxury cars. Diesel powered off-road equipment such as the ones used for agricultural and construction purposes has been obliged to use SCR technology since 2014.

How to Maintain DEF Purity

DEF purity is vital. One essential aspect in maintaining DEF purity and quality is the kind of dispensing system used. Closed system containers have a valve coupling system that protects the container opening on drums and totes (IBC) to prevent debris, dirt, bugs, etc from getting 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.

Purchasing 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 usually 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.

DEF Warning System

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 decreased engine power or restrains the number of times you can turn the engine on will be reliant on the actual 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.