Gonzo42ExplorerFeb 06, 2014What is it with DEF?Just what is the Diesel Exhaust Fluid (DEF) ? What does it do and why do I need it? This is my first diesel and I never heard of it.
About RV Tips & TricksLooking for advice before your next adventure? Look no further.25,174 PostsLatest Activity: Nov 02, 2025
