Technician A says that putting DEF into fuel tanks can void engine warranty. Technician B says that DEF is non-corrosive and will not harm painted surfaces. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because putting Diesel Exhaust Fluid (DEF) into a fuel tank can indeed cause significant damage to the engine and fuel system, potentially voiding the warranty. DEF is specifically designed for use in selective catalytic reduction (SCR) systems to reduce emissions and is not intended for the fuel tank. Technician B is incorrect because DEF can be corrosive to certain materials and can cause damage if spilled on painted surfaces.

Technician a Says That Putting DEF into Fuel Tanks Can