Yes I know it really doesn't matter, but when breaking in a new engine is heat cycling engine important? Is it just better to break it in with as few thermal cycles as possible, varying rpm, varying load, ect. The engine in question is actually a 3cyl yanmar diesel in a tractor, and these engines use a little oil until broken in. I believe these actually have a noticeable breaking period vs a new automotive engine. I was always under the impression that heat cycling when breaking in was beneficial. Thoughts?