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Introducing PEAK Blue DEF diesel exhaust fluid - a specially blended solution designed to help meet the EPA's near-zero emission requirements for selective catalytic reduction (SCR) diesel engines. Made with the highest quality raw materials, this non-toxic and colorless formula is stable and approved for use in all diesel SCR systems. The use of DEF helps convert dangerous NOx emissions into harmless nitrogen and water, reducing your impact on the environment while providing you with a cost-effective and efficient option to maintain engine performance. Whether you are driving a light, medium or heavy-duty vehicle, PEAK Blue DEF is the perfect choice for ensuring clean air and smooth operations in your diesel engines.