Home›Products›Engine & Fuel Systems›Oil & Engine AdditivesOil & Engine AdditivesBy keeping your engine lubricated, STP® Oil Additives can help reduce friction, heat buildup and overall engine wear. In addition, our specialized engine and oil additives can help stop oil leaks and reduce oil consumption and exhaust smoking.Product Category Please selectEngine & Fuel SystemsFunctional FluidsMaintenance & OtherProduct Type Please selectFuel AdditivesMotor OilOil & Engine AdditivesSort by Please selectA to ZZ to ASort by Sort byA to ZZ to AFilterFilterProduct Type Engine & Fuel Systems Functional Fluids Maintenance & OtherView ProductsView ProductOil & Engine AdditivesOil TreatmentView ProductOil & Engine AdditivesCeramic Oil TreatmentView ProductOil & Engine AdditivesHigh Mileage Oil Treatment + Stop LeakView ProductOil & Engine AdditivesSynthetic Oil TreatmentNewView ProductOil & Engine AdditivesHeavy Duty Ceramic Oil TreatmentView ProductOil & Engine AdditivesSmoke Treatment