... state products, without any harm to the engine, only once used, eight years’ effect! 2.Product ... reduce the molecules attraction of hydrocarbon fuels (gasoline, diesel) , so that the oxygen will adsorb and ... 500 kms, pls replace the old oil and filter, in future, only reaching 10,000kms, then replace ... the old oil and filter 3, so that exhaust gas purification effect is the best. ...