How much castor is too much?
I bought a gallon of Sig Championship fuel the other day. It is 15% nitro and 20% oil (half synthetic/ half castor). Is there such a thing as too much castor? I am running a O.S. 46 FX and a 15 year old Enya 60. I have been using Ritch's Brew with 15% nitro and 18% oil. Which would you guys recommend? Thanks for the help.
Ed