Synthetic Oil good or bad?

[NO_H2O]

Jake has done testing of a few synth. oils. I asked him about it while I was building my engine up there. He said he recomended 3 oils, all 20w50's. They were Royal Purple, Redline, Valvoline full synth. The Red Line and Valvoline were very close in the testing and Royal Purple was just ahead of those 2. The test monitored head temp vs oil temp in the same engine under the same loads. The oil needs to be able to take on heat and then give it up in the cooler. Some syth. oil don't pick up heat (washing it from heads, etc) and others don't give up heat in the cooler. He runs Royal Purple in the 912E and Valvoline Full Synth. in the Bus. I run Valvoline Full Synth 20w50 in mine.