The average consumption rate of
DEF is between 2-3% of the diesel fuel
consumption. For example, for every 100
gallons of diesel fuel consumed, between 2
and 3 gallons of Diesel Exhaust Fluid will
be automatically injected into the exhaust
system. A typical diesel truck should go
about 300 miles on one gallon of Diesel
Exhaust Fluid. The refueling interval will
depend on the size of tank you have.
If you know the average fuel
consumption of a vehicle, and the DEF dosage rate, you can easily calculate the estimated amount of DEF
that will be used. For a quick calculation, go to
DEF Usage Calculator
Here is an example at **2%** dosage rate:
Annual miles for average truck = 120,000 miles
MPG for average truck = 6 mpg
120,000 / 6 mpg = 20,000 gallons diesel fuel
per year
DEF usage @ 2% of fuel consumption = 400 gallons
of DEF / year
400 gallons / 20 gallon tank (average size) = 20
DEF fill-ups / year Here is an
example at **3%** dosage rate:
Annual miles for average truck = 120,000 miles
MPG for average truck = 6 mpg
120,000 / 6 mpg = 20,000 gallons diesel fuel
per year
DEF usage @ 2% of fuel consumption = 600 gallons
of DEF / year
600 gallons / 20 gallon tank (average size) = 30
DEF fill-ups / year |