With propane start it isn't until the kero ramp starts that lubrication begins. And a small point maybe, but you don't have to buy that ridiculously expensive and hard to find Powermax.
Tony while this may be true I have a P-120 that has aorund 400 flights on it. Very few missed starts and the bearings were checked at around 260 flights and were in perfect shape. It does not seem to be an issue, at least not in my limited experience.
BMT,
You stated that the BMT engines only provide lubrication if the beargins appear to be to dry. I am assuming that you are spinning the engine and monitoring RPM to calculate that. If so does this not put the engine into a situation where the bearings could potentially be lacking in lubrication just like all the rest? Not a bash just curious.