Rational emotive behavior therapy (REBT) is a type of cognitive therapy that focuses on challenging irrational thoughts. Learn more about the history of this therapy, how it’s used, and how it ...

Diesel Exhaust Fluid (DEF) is a crucial component in modern diesel vehicles, introduced to comply with US Environmental Protection Agency (EPA) regulations that began in 2010. It's a solution made ...

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.

Generally, DEF has an average shelf life of 12 months. Estimates, however, can vary based on several factors. For instance, if you store DEF in direct sunlight or high heat, its shelf life will ...