Star tron enzyme fuel treatment is a multifunctional fuel additive which uses a unique enzyme technology that allows all engines to start easily and run smoothly, even when using ethanol-blended fuel or after sitting idle for months.Features Helps increase fuel economy Makes engines start easier, run smoother Cannot be overdosed Disperses bacteria without the use of poisons/biocides Reduces all emissions, including carcinogenic, particulate smoke - eliminates diesel soot Stabilizes diesel fuel for up to two years Lowers fuel system maintenance Eliminates carbon build-up from burners, injectors and exhaust components Specifications Dimension: 2.25 H x 3.25 W x 8.75 L Weight: 1.25 lbs DirectionsAlways add Star Tron just before each fuel fillup. Remove cap and pour the prescribed amount into tank. Overdosing is not harmful.