Which diesel exhaust fluid is best? When you have a diesel vehicle, besides adding fuel, you need to add diesel exhaust fluid. Diesel-powered vehicles require diesel exhaust fluid to reduce engine ...

In the best case scenario ... If you do crank your engine after adding Diesel Exhaust Fluid to your fuel tank, you likely won't be on the road for very long, as the presence of DEF in your ...

Why? Because the thing that makes SCR work its magic is a consumable fluid called diesel exhaust fluid, and owners of diesel vehicles were going to have to add it to their vehicles. Nobody likes ...

But just like other fluids (say, oils and additives) that help keep your engine clean and efficient, DEF is only effective and safe for a limited period. Given how important the fluid is ...

Selective catalytic reduction (SCR) was its solution to reduce diesel engine emissions, but it needs diesel exhaust fluid (DEF) to work. Diesel exhaust fluid is an automotive-grade combination ...

Related: What’s the Best One-Ton Heavy-Duty Truck for 2018 ... Most of these systems use diesel exhaust fluid (a mixture of urea and deionized water) sprayed into the exhaust stream to break ...

Diesel exhaust fluid doesn’t last forever. Before restarting an idle heavy-duty diesel truck or using DEF from storage, make ...