OXVOL Engine Oil Additive is an engine oil additive that is specifically designed for optimum bridging of long periods. OXVOL Engine Oil Additive improves the reliability of vintage and classic engines significantly. Our product and ensures long-term protection of the engine. OXVOL Engine Oil Additive reduces friction, guaranteeing the aggregates run more smoothly. it is suitable for all commercial motor oils in gasoline and diesel engines with and without diesel particulate filter.