What is Diesel Exhaust Fluid (DEF) – FAQ

Q: What is Diesel Exhaust Fluid (DEF)?
A: DEF is a non-toxic solution made of urea and deionized water that helps reduce harmful emissions from diesel engines.

Q: How does DEF work?
A: When injected into the exhaust stream, DEF reacts with the harmful nitrogen oxides to convert them into harmless nitrogen and water vapor.

Q: Is DEF safe to handle?
A: Yes, DEF is non-hazardous and safe to handle, but it should be stored and handled according to manufacturer guidelines.

Q: Do all diesel vehicles require DEF?
A: No, only vehicles equipped with Selective Catalytic Reduction (SCR) technology require DEF.

Q: Can I use any type of urea for my diesel vehicle?
A: No, it’s important to use automotive-grade urea specifically formulated for SCR systems to avoid damaging your vehicle’s emissions system.

Q: What happens if my vehicle runs out of DEF?
A: Most modern vehicles will limit engine power or prevent the vehicle from starting if it runs out of DEF, so it’s important to keep an eye on the levels.

Q: How should I store DEF?
A: Store DEF in a cool, dry place away from direct sunlight and extreme temperatures. It should also be kept in its original sealed container until ready for use.

Q: Can I mix different brands of DEF together?
A: It’s recommended to stick with one brand of DEF as mixing different brands may affect the quality and performance of the fluid.