What is DEF :
Diesel Exhaust Fluid (DEF) is an organic non- toxic compound made of 32.5% urea and 67.5 % de-ionized water.
DEF helps to convert NOx into Nitrogen gas and water vapors. It is stable, colorless, odorless, and meets accepted international standards for purity and composition.
DEF is carefully regulated by the American Petroleum Institute & is mandatory on all Diesel motors built after Jan 2010.
How will temperature affect DEF:
At temperature below 12º F (at which DEF will Freeze) trucks will be operational (with limited mileage and speed) until the DEF tank-thawing process is complete by the on board computer & heater.
There is no concern regarding thermal stress with the plastic DEF tank. Tanks have been extensively tested in a variety of extreme climates.
DEF, when heated and maintained at a temperature above 120 degrees Fahrenheit will very slowly start to form small amounts of ammonia. It would take over two years at this constant temperature to convert DEF into a level of what household ammonia is.
How many miles will a tank of DEF last:
2.5 Gal of DEF will yield over 800 miles
DEF estimated usage rate is approximately 2% per gallon of fuel.
Where is DEF injected:
It can not be mixed with the Fuel
It is injected in the exhaust pipe just before a special exhaust converter
