I'm sure this has been covered, but my search was fruitless. I have a few older saws, the richest mix listed is 16-1 in my Pioneer P25. So whats the current thinking? Are the new oils so much better I can safely run something like 30-1 or 40-1? I know a guy who runs an old Mac 10-10 with the same 50-1 s his Stihls, but he ain't all that bright, so I'm all ears on this.