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Is there a cheaper alternative to DEF?

coztex

New Member
Jul 2, 2023
5
0
Truck Year
2015
Hello, is there a cheaper alternative to DEF? Can we use just water or maybe urine?
Thanks!
 

TC Diesel

Well-Known Member
Jul 14, 2016
2,461
695
Truck Year
2015
2013-16 Can run 80% distilled water 20% DEF..SO That's 2 gallons distilled water 1 gallon . I ran that ratio the entire four years of ownership of my 2015 Once I got a rational code but I just added a little more DEF. Deleted the code and never returned.
 

DATA

Member
Jul 8, 2021
47
5
Truck Year
2016
2013-16 Can run 80% distilled water 20% DEF..SO That's 2 gallons distilled water 1 gallon . I ran that ratio the entire four years of ownership of my 2015 Once I got a rational code but I just added a little more DEF. Deleted the code and never returned.
Did you run that in the winter to?
 

TC Diesel

Well-Known Member
Jul 14, 2016
2,461
695
Truck Year
2015
Yes...MN winter..
 

TC Diesel

Well-Known Member
Jul 14, 2016
2,461
695
Truck Year
2015
ALL DEF FREEZES AT 12F...the system is designed to start thawing at 26F ..so No Problem in any of my Diesels. MANY ARE running that ratio..2018 + needs 2 Gallons DEF to 1 Gallon distilled water..
 

TC Diesel

Well-Known Member
Jul 14, 2016
2,461
695
Truck Year
2015
2 gallons distilled water to 1 gallon DEF. IF SOME SOME ODD reason you trigger a rational code just at al little more DEF and drive a few miles it will dissappear.
 
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