I know nothing about either fuel but if the motor wasn't 330 degrees f, my first thought would be the fuel and since you just switched fuels, I would tell him to rethink his formula. If it doesn't contain at least 6% castor, things like that can happen. I bet he was trying an all synthetic blend or maybe a 50/50 (4% synth, 4% castor for instance). Might work for offroad or short tracks but not on a fast 1/8th onroad track.
Sean. Certified speed crazed mowron.
Team Shepherd USA