Re: That often?

Posted by Packard 1948 On 2015/11/2 18:02:52

Modern engines have a PCV valve and that really helps to keep the crankcase clean because it sucks out the water vapor, acids, and soot so the oil stays cleaner longer. Also, if the oil is changed frequently the PCV valve engine will have significantly less sludge on the walls of the engine.

I saw a really neglected 1970 Ford 390 that never had the oil changed (the only added oil when the red light would come on) and when the valve cover was removed the whole valve bay had Jello like sludge everywhere except the spaces under the rocker arms (looked like a Jello mold of the valve cover)...so even a PCV valve could not keep that neglected engine clean.