BLUE DEF FLUID 2.5GL is a high-quality diesel exhaust fluid designed to reduce harmful emissions in diesel engines. This 2.5-gallon container provides a reliable supply for selective catalytic reduction (SCR) systems, helping to convert nitrogen oxides into harmless nitrogen and water vapor. Formulated to meet strict industry standards, it supports engine efficiency, regulatory compliance, and environmental responsibility. Ideal for professional use in maintaining clean and efficient diesel-powered vehicles.