RE: Welcome to Club SAITO !
Misfit:
Add four ounces per gallon. I don't know which heli blend you're using, but if it is, say, 20% oil to start here's the mix:
-comp-------start%----end%
Synth Oil------20--------19.39
Castor Oil------0---------3.03
Nitro-----------30--------29.09
Methanol-------50-------48.48
HTH
Bill.