Best practice for DEF levels is to add or top of DEF tank every ... Freezing does not change the effectiveness of the fluid. The ideal storage temperature for DEF is between 15ºF and 77ºF ...

The high quality Diesel Exhaust Fluid (DEF) solution will drive optimal vehicle performance, boost drivetrain efficiency, and extend the vehicle's longevity. Advt "Our partnership with Tata Motors ...