I have a Dl 50 and a 111, I am also the unfortunate, 'temporary operator' of a crrc50 pro.
I am rather scheptical regarding the manner in which we are advised to run our engines in, ie start or non synthetic oil, switching over to 'the better stuff' after a couple of gallons. I 've owned new chain saws, jets ski's, outboards, weed eaters, and a hedge trimmer. All of these things are produced and used, in far greater numbers than our Dls, and yet I have never heard of breaking them in with anything but the regular oil that is intended to be used for the life of the engine. I can see the point, but really feel that it is overkill. You buy a saw, nail it from the first start, and run it o death for 400 hours, throwing it in the shed for months on end with no attention (other than the bar and chain) and it never misses a beat , DL's are getting pampered to death !