Onyx Additive Company was established under the Rexol Corporation Brand and has been developing, producing, and providing additives for over 10 years. Our range of technology solutions include engine oil additives, driveline additives, and industrial additives, in addition to speciality and custom additives. Equipped  with our years of expertise and state of the art machinery, we help our customers develop and market additives to achieve their performance goals while  considering emission redu