DEF Fuel Additive

Gas Fueling and Customized fuelling schedule

The future of fuelling

At Hiway Fuel Services, we pride ourselves on providing you with a complete refuelling solution backed by a commitment to personalized service and support.

What is DEF? (Diesel Exhaust Fluid)

DEF is a naturally occurring compound of nitrogen that is primarily produced from natural gas and turns into ammonia when heated. It is used in a number of industries, most commonly as a fertilizer for agriculture.

Automotive-grade DEF is used as a carrying agent for the ammonia needed to reduce nitrogen oxide emissions from vehicles by converting them to nitrogen, water and carbon dioxide. DEF is stable, non-toxic, odourless, and completely safe. It optimizes the performance and efficiency of your engine, and continues to perform at the wide range of climate temperatures.

Frequently Asked Questions

Still open questions?

Diesel Exhaust Fluid (DEF) is a non-hazardous solution, which is 32.5% urea and 67.5% de-ionized water. DEF is sprayed into the exhaust stream of diesel vehicles to break down dangerous NOx emissions into harmless nitrogen and water. This system is called Selective Catalytic Reduction (SCR) and can be found on 2010 and later model year trucks and many diesel pickups and SUVs. DEF is not a fuel additive and never comes into contact with diesel. It is stored in a separate tank, typically with a blue filler cap.

Consumption is measured as a ratio of diesel fuel use, normally termed the “dosing rate” or “treat rate”. Medium- and heavy-duty vehicles have a dosing rate of 2-3%. This means that if your truck has a fuel efficiency of six miles per gallon and a dosing rate of 3% it will use approximately 1 gallon of DEF every 200 miles.

Generally speaking, when the DEF tank level drops below 10% an amber warning lamp will come on, at 5% this lamp starts flashing and below 2.5% a solid amber warning light is displayed. If the truck is allowed to run out of DEF the engine’s power is reduced, a solid red warning will be displayed and the vehicle speed will be limited to 5 mph until the DEF tank is refilled.

Yes, we carry both 9.46 liter jugs and totes up to 2000 liters.

One simple word, “convenience”.

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