Over the last few years, the dwindling amounts of ZDDP in off-the-shelf engine oils have sent many collector-car enthusiasts scrambling for alternatives that include enough zinc to keep their engines with flat-tappet camshafts running. Diesel oil worked for a while, and we even heard some accounts of guys crushing up tablets of raw zinc to […]

There are a number of engine oils on the market today, but several of them have been formulated without modern, daily drivers in mind. When it comes to our collector cars, many will seek out the few mineral or synthetic engine oils containing zinc and phosphorous, also known as ZDDP. That small list has since […]

As much as the automobile has changed since the days of the horseless carriage, one thing has remained the same – they all run on gasoline. But gasoline today is far different from the gasoline that was used decades ago, as Jerry Heasley wrote in his Half-Hour History of gasoline from SIA #70, August 1982. […]