As familiar with engines as I am, this is in regards to aeroplane piston engines and their workings. Although car engines I am also au-fait with, and no staranger to, oils I am not.
What oil would anybody recomend for running in purposes? Mineral or synthetic? And what brand?
Planes use a what is called a straight mineral for running in. Basically, it only lubricates and nothing else. (No protectve properties or clensing agents) This allows for a certain amount of wear to take place without fear of glazing the bores. Then ashless dispersant oil is used.
For car engines.........................
??
