Byron's Premium Y/S fuel OK for heli?

[Rodan]

My LHS has been out of "heli" fuel, and I'm down to my last couple of tankfuls...

I picked up a gallon of Bryon's Premium Y/S 20% nitro 20% synthetic, this'll be OK in a Raptor 50 w/ OS hyper, won't it??

The specs look the same as the "heli" fuel, except maybe the "low vis" oil??

[WayneBrown]

Changing brand and/or nitro content usually means you will be retuning the engine, and finding the 'sweet spot' for the needles all over again.
YS 4 stroke fuel is basically heli blend, however I'd be concerned enough to richen the main needle at LEAST a half turn, and figure out settings from there.
Beat up the LHS and buy your fuel by the case. :)