Some rules are made for you, and some rules are made by you. Those personal rules create a higher level of safety for you and your passengers, and they are the mark of professionalism in a pilot.
Owners of a certain type of Continental engine, the cam-at-the-bottom variety, are undoubtedly familiar with the annoying seepage of oil from swaged pushrod tubes and rubber pushrod seals. Now there's a cure, and author Ron Darcey describes the fix.