The Stovebolt Site Forums The Shop Area Engine Shop Stock 58 235 break in

http://www.avweb.com/news/maint/182895-1.html This article convinced me to use straight mineral oil. An aircraft engine is $100,000 new and an overhaul is $20,000. Why the cylinders are a little more exotic than cast iron... the explanation is sound. Then I found this: http://www.drivenracingoil.com/news/dro/training-center/articles/zinc-vs-detergent/ "Detergents and dispersants in the oil complicate the situation. Detergent and dispersant additives “compete” against zinc in the engine because they are polar molecules as well. [b]Detergents and dispersants clean the engine, but they don’t distinguish between sludge, varnish and zinc[/b] – they clean all three away. Modern API certified oils contain higher levels of detergents and dispersants due to the exhaust gas recirculation (EGR) systems on passenger cars and diesel trucks. The “old school” theory on engine break-in was to [b]run non-detergent oils, and this allowed for greater activation of the zinc additive in the oil.[/b]