For most diesel-powered engines, DEF is vital so the vehicle performs at its best. Here's what it is exactly and what the acronym stands for.

Problem: DEF Contamination. Dirt, rust and other particles can cause abrasion on internal components. Having too much or too ...

I recently read a pretty startling statistic—in the next year, the off-highway engine market will consume about 20 million gallons of Diesel Exhaust Fluid (DEF). In the next five years that ...