Abstract
A catalytic system using rare earths (mainly CeO2) for reducing the vehicle pollutant emissions and simultaneously the fuel consumption, has been studied in the frame of a pilot project realised in Thessaloniki-Greece, based on multi-tested gasoline engine cars. The main idea of this catalytic system is to provide the combustion chamber with an adequate amount of cerium oxide
(CeO2), without affecting the operational parameters of the engine. The aim of the project is to determine the influence of the CeO2 catalytic system on the emissions reduction in correlation to the accumulation of Km, for various vehicle types.