Oh Lord.
I expect you're just being facetious, but there's no way to use urine + water in lieu of DEF.
The bottom line is that urine and DEF = Never. The urea found in both are of different concentrations, along with the chemical composition of their water.
www.sclubricants.com
The chemical makeup of human urine contains the following:
- Urea: 9.3 grams/L (In contrast, DEF requires 32.5% urea)
- Chloride: 1.87 grams/L
- Sodium: 1.17 grams/L
- Potassium: 0.750 grams/L
- Creatinine: 0.670 grams/L
- Other dissolved ions, inorganic and organic compounds
"Human urine (as well as urine from other animals) contains a much different urea content than is required for the making of DEF. It also contains additional compounds and dissolved ions that a diesel engine’s catalytic reduction system (SCR) cannot handle."
"The urea used in the manufacture of DEF is synthetically derived from ammonia and carbon dioxide, and urea production plants are often adjacent to other sites where ammonia is produced, such as coal and natural gas refineries."
"Diesel exhaust fluid is not made of urine, and if you are going to urinate in your SCR system, you’re looking at having to pay some pretty hefty repair costs to clean and replace engine components once they have been contaminated. Following the deductive reasoning that urine has urea in it, therefore, urine + water = DEF is 100% wrong, and will cause you a myriad of expensive mechanical problems. The urea found in urine is not in the proper concentration needed for DEF, nor is it of a sufficient level of purity, in either urea or water. The bottom line, to spell it out just one more time… urine and DEF = Never. DON’T PEE IN YOUR DEF TANK!"