Same DFL as in the 1L and 4L but in a convenient and handy package. Includes extension spouts to facilitate easy pouring into all diesel tanks. No measuring, one can per tank fill. Notice immediate results in Duramax, Powerstroke, and Cummins light duty engines. Contains extreme lubricant ProMax anti-friction additive as the component that restores and exceeds diesel fuel lubrication standards to pre ULSD. Prevents fuel gel in extreme cold temperatures. Improves starting, reduces fuel consumption, reduces emissions, increases power, shortens ignition delay, increases lubricity, can prevent stiction, protects from cold temperature fuel and fuel filter gel. No more half bottles of nasty smelling additives rolling around in your truck.