I ran chainsaws for forty years . I run 50 to one then some ware around with 80 to one with amsoil I run lean a carborator I never hear 4 cycle or some bubble sound . There is a certain air to fuel that is the best I think it is 14 to 1 or so . Nobody worries about it to much oil in a two cycle then get all upset about it in four cycle .Not sure were I'm going with this ? Well maybe I can. I get the most power out of a saw I can . If you want to flood the crap out of a saw with fuel an oil that's ok . I have rented a lot of cement saws that were total turds . The Ideal oh a lot smoke an no power comes mind .