ENGINE SLUDGE CURE (please CAR help)?

when the four or six cyls start doing that it can be sludge or your valve guides are getting warn out.. This is what you do. take it to a dealer, do a maintance. Timing belt, valve cover gasket, etc. tell them what is doing, and they have the stuff to do it with. there is over the counter stuff you can buy to do it your self. older cars are ok, like the old 69 camaro. these newer cars if it is one that you want to keep, then fix it, but it is going to be spendy.. but at least it will be done right.