1.Rinse the colloid, carbon residues, greasy sludge. 2.Reduce friction, restore the elasticity of sealing rubber. Motor Flush: This engine internal flush is formulated with fine oil and special agents to automatically rinse/wash the colloid, carbon residues, greasy sludge, reduce friction, restore the elasticity of sealing rubber, and reduce oil consumption. It has corrosion remover to prevent ...