A GMC Sierra owner accidentally filled his diesel tank with diesel exhaust fluid (DEF). DEF in a diesel tank can damage the fuel system, leading to hugely expensive repairs. An independent shop saved ...

Most diesel truck owners understand how to put diesel exhaust fluid (DEF) in their trucks. However, some make the mistake of getting DEF in their fuel tank instead of the dedicated DEF tank. As the ...

Diesel Exhaust Fluid has an expiration date, after which it becomes far less effective and can even damage your engine.

As Covid-19 restrictions are being lifted across most states in the country and with warm weather upon us, it is important for truck drivers to consider proper management of Diesel Exhaust Fluid (DEF) ...