Diesel Exhaust Fluid (DEF) is required for modern diesel engines equipped with Selective Catalytic Reduction (SCR) systems. DEF helps reduce harmful emissions while allowing diesel engines to operate efficiently and remain compliant with environmental regulations. Summa Energy provides dependable DEF supply for fleets, generators, and commercial equipment operators who require reliable fuel and emissions support across New Jersey and New York.

Diesel Exhaust Fluid is a mixture of high-purity urea and deionized water that is injected into the exhaust stream of diesel engines using SCR technology. This process converts nitrogen oxide emissions into harmless nitrogen and water vapor. Most modern diesel trucks, commercial vehicles, and heavy equipment rely on DEF to maintain emissions compliance and proper engine performance.