Re: Wrong Oil Mix?
50 to 1 fuel to oil ratio is only necessary for (at or near) full throttle operation. That is one of the reasons that the more expensive engine brands went to VRO oil injection. It varies (usually ) from 100 to 1 at idle to 50 to 1 at full throttle.
SO: Put your mind at ease! If your engine was already broken-in, and well run beforehand and had a base of oil in it (coating internal parts) already, you most likely would be fine. If you did not run it a full throttle for other than short periods, the engine will have suffered no harm at all. But--don't do it again!