Why Keep Diesel Exhaust Fluid on the Lot?

Any manager of a trucking, shipping fleet, repair van, or construction equipment lot will attest to the many duties and tasks that must be completed to keep vehicles on the road. Preventative maintenance must be arranged with an outside company or scheduled for the in-house mechanics. All fluids must be on-hand for efficient and safe operation of vehicles, and diesel fuel needs to be available on the lot. It is easy to store brake and transmission fluid, windshield washer, and radiator coolant and anti-freeze.

Considerations for Storing Exhaust Fluid

Keeping diesel exhaust fluid on the lot is critical but can be complicated. The biggest challenge is storage due to the corrosive properties of the fluid and the sensitivity to temperature. There can be no metal present in containers, pumps, and nozzles because the fluid corrodes it quickly. This process degrades the purity of the fluid and can interfere with the efficiency of the exhaust system. That also effects the fuel efficiency of the vehicle.

This fluid is sensitive to cold temperatures and will freeze at -12 degrees Celsius, which is 10 degrees Fahrenheit. Inside storage is best unless the lot has an exhaust fluid tank buried underground like the fuel tank. Outside storage can be accommodates with thermal wraps to cover storage tanks or insulated cabinets to house those tanks.


Keeping DEF on the lot will save managers time and money. Buying the fluid in larger quantities is cheaper than purchasing five-gallon containers. It also eliminates the issue of drivers forgetting to check the fluid levels while on the road which saves money on expensive repairs to the system should it dry up. Filling the fluid tank before leaving the lot is wise because on full tank of pure fluid will last for approximately seven-thousand miles.


The company maintains a nationwide network for the delivery of diesel exhaust fluid suited for the needs of the business. Large lots with hundreds of trucks are best served with expansive underground tanks and scheduled deliveries. Small local lots with service vans or repair trucks can arrange to have fluid delivered at regular intervals or call for a just-in-time delivery if business is unpredictable. A landscaping company, for example, will use less fluid in the winter because large trucks will not be used to transport soil, gardening supplies, or riding lawnmowers.