does def fluid go bad
1. FICTION: DEF degradation will be a major problem. FACT: Diesel Exhaust Fluid doesnât degrade nearly as quickly as people assume. For example, at 86Â°F, DEF has a shelf life of a year.REMEMBER: Do not equate shelf life to spoiling like food, as DEF will not go bad.IT will lose some effectiveness, and the SCR will dose at a higher rate, but it wonât âgo bad.â If maintained at a constant temperature, DEF manages to stay for several months.For example, at 74Â°F in Los Angeles, Diesel Exhaust Fluid has the shelf life of 44 months. 2.. FICTION: DEF degradation will be a major problem. FACT: Diesel Exhaust Fluid doesnât degrade nearly as quickly as people assume. For example, at 86Â°F, DEF has a shelf life of a year.