Diesel Exhaust Fluid (DEF) has been helping diesel engines of all sizes meet more stringent emissions standards. DEF is being used in vehicles ranging from 1.8-L to 7.0-L diesel engines.

Early applications started to hit the roads in 2005, and for the 2010 model year, almost every diesel engine uses DEF.

DEF is used in diesel vehicles to reduce nitrogen oxides in exhaust emissions by selective catalytic reduction (SCR). In this video, we explore when and how to perform DEF maintenance before temperatures start to drop.

This video is sponsored by Auto Value and Bumper to Bumper.