If fg is not a deal than a high grade iso 460 gear oil cross. Several to choose from. pm me if interested in Schaeffers gear oils.
mineral, semi,straight pao are all available.
I use Schaeffers 131 Neutra, i am sure there are others. drain. Run cheap mineral oil thru with the purging agent. Short cycles.Repeat. Repeat,
Poly and traditional oils will turn to jelly.
Last edited by salesrep; 02/10/18 10:06 AM. Reason: spelling