I bought a "homelite" some many years ago, and it specced 50:1, as does FIL's identical Ryobi. The plastic's not identical, but when you take the plastic off it is.
Been running 30(ish) to 1 in it for 15+ years...i like a slightly wet exhaust to show me that the oil gets through the entire system.
Never fouled a plug.
This year ran TCW-3, and gummed up the spark arrestor with sticky gummy stuff, that burned off in 10 seconds with a propane torch.
With the muffler off, the internal looked brand new.
As did the asbestos exhaust gasket..BBW