So, you took a chance on ruining your equipment you use daily, instead of just losing 6 guys pay. You must pay very well, for those 6 hours to be worth more than your equipment, or you run cheap equipment. Your call, it's your money.
I didn't take a chance ran the same kind of sump oil in an old 2T old ag bike years ago for a week out bush, it continued to run for many years after that so mustn not have done any great harm. I based my decision on that and It worked in the saw fine.
Sure could have sent everyone home and lose making 10-20k for the day depending on what we would of been cutting.
If it didn't work I just would have just grabbed another saw and tried a different oil like used diff oil or something would have eventually found something that worked.
Guy's act like chainsaws are some delicate fragile to be babied toy.
In the real world ya don't have to babie em as long as ya have a half decent oil mixed at more oil than 50:1 they will run reliably for years on end.
I personally have never blown up seized a saw in over 25 years running them myself I'm not sure what I'm doing wrong? lol
50:1 leaves you with zero margin of error run more oil than that the bloody things go forever.
Maybe you are the one running cheap equipment stressing it's going to blow not something I've ever stressed about personally.
And Don't get me wrong nothing wrong with guys taking good care of there saws. I just like to show a different side that they are tough and can take a beating that should help guys sleep easy that take good care of there saws knowing they will get a lifetime out of em.