this trick is for the diesel rides! )

practice ko din yan eh... bago ako nag pa-register nag flush din ako ng water sa exhaust pipe... tama si theveed... kung in the first place ay may problem ang setting ng engine mo eh talagang uusok pa din... but what this 'cleaning' is suppossed to do is at least minimize if not eliminate the black smoke that comes out coz of the soot that goes along with your exhaust gases! imho... ;)