> Don't take advice on your high-performance, flat tappet camshaft break-in from the Economist... But do take heed of their admonition to understand precisely

> Don't take advice on your high-performance, flat tappet camshaft break-in from the Economist... But do take heed of their admonition to understand precisely what you are putting into your vintage engines. I frequent a vintage motorcycle list and the discussions regarding additive packages and ZDDP specifically are frequent. The consensus there is that ZDDP is the most important factor in engine longevity.