# How Much Diesel Exhaust Fluid (DEF) Does A Truck Use?

> 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 up of 32.

- **Source:** [SlashGear](https://www.slashgear.com/1865984/truck-def-usage/?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6835dd29897bc49a922bc3fa)
- **Published:** 2025-05-27
- **Category:** Cars
- **Tags:** #diesel #exhaust #fluid #does #truck #agency #began #comply
- **Canonical:** http://localhost:4321/a/6835dd29897bc49a922bc3fa

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_GearOpen's distilled summary. The full original article is published at SlashGear (source link above); GearOpen does not republish the source's full text._