This product is particularly formulated in order to reduce the exhaust emissions of the vehicle and gets rid of the smell that comes from the catalyc converter. It reduces noxious exhaust gases such as CO and HC and this product does not harm the catalyc converters. In addition to emission reduction, this product also decreases petrol consumption. Repeat treatment every 4,000 km (2,500 miles). The product can be used in petrol carburetor and injection engines, with or without turbocharger. One bottle of 300ml will treat up to 70 liters of petrol. This product shows best performance before re-filling the petrol.