RE: DL50 what oil ratio?
For all you guys. I've been stating for years to avoid the Amsoil and Lawnboy products. What you've recently experienced is nothing at all new or unusual and has been experienced many times before. RC Bugman provided the same advice because he encountered the same results I did.
Good oils at reasonable ratios in a well tuned and reasonably cooled engine will never get you in trouble. Wall Mart oil at 32-1 works just fine. Really!! Worst case is every 100 hours pull the jugs and do a little clean up work. Just to make life as easy as possible I'll get back a little later with a good over night chemical dip that causes no harm and does a good job.
No offense, but when it comes to the issues noted with the 150 and the other engine, I told ya so.