What does it look like to be proactive in keeping your DEF pure and your vehicle running as it should?

While getting DEF out on the road

• Containers for DEF should not be made of metal, as DEF reacts to many metals.
• The containers holding the DEF should be designated DEF containers, with no alternate previous uses.
• If filling DEF tank through a smaller container (such as a funnel,) take care that the container is clean and free of dirt, grease, other products, etc.
• Keep your DEF fill opening as clean as possible to prevent contamination when a funnel or nozzle is inserted.
• Check the manufacture date of the DEF: The shelf life averages between 1 – 2 years.
• DEF should only be mixed by those certified to do so: Do not purchase DEF from anyone who has mixed it without this qualification.

When storing & dispensing DEF at your facility

• DEF should not be stored in direct sunlight: The shelf life of DEF begins to reduce when stored around 80 degrees or higher. (Ideal storage is in a cool, dry, ventilated place.)
• Regular maintenance and testing should be performed by personnel who are familiar with the use of a refractometer (which measures the concentration of water-soluble fluids for purity of DEF.)
• When choosing a DEF supplier, look for use of a closed-loop system that provides evidence of tampering. (Closed systems use a system that seals the opening of the container to prevent contaminants from entering.)
• Be committed to meeting the ISO 22241 standard, 100% of the time.
• Store DEF by batch dates and distribute in a first in, first out system to maintain optimum DEF life.