On Jul 8, 2007, at 9:59 PM, Colyn Case on earthlink wrote:
George said, Keep in mind that there is about 400 million hours of aircraft piston engine experience in engines for which there was no oil filter and they never changed the oil - - they just added oil as needed. Engines had excellent TBO’s. In many cases, over 3000 hours.
Well that's cool.
Does that include current vintage turbo chargers and valve trains?