[Ozarkguy]

I concur Bob. I too am afflicted with over 45 years an aviator. I write the Mech training books for the FAA now. Most of the wear in engines is during that time it takes to get the oil flowing. That's why you see in Some Diesel engines, the throttle is disengaged from the peddle until the oil is flowing. With a single grade oil preheat is more essential... What flows best.. Then you get into the other factors. Heat, carbon retention etc. oil sampling. Is a good thing!! It has saved my heinie more that I like to think about. Many coaches do as much setting as traveling or more. Cold dry starts is the death of engines. Moisture and dry bearings in the turbo, lifters, valve guides all get a bit more wear. This shows up in sampling. ... I could go on. But don't want to bore folks.