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Reformulated Motor Oils and Your Flat-Tappet Engine


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In an effort to reduce harmful emissions caused by the burning of engine oil, manufacturers have reduced or removed some oil additives that are essential to keeping older engines running. Flat-tappet engines common in older British cars as well as Volvos and some American engines are wearing cams and lifters at a remarkably high rate.


This is a companion discussion topic for the original entry at https://www.hagerty.com/articles-videos/Articles/2006/05/22/Reformulated-Motor-Oils-and-Your-Flat-Tappet-Engine