Its just personal choice. And what you do with your truck may influence your choice.
I would say for hardcore abuse yes a synth would probably stand the heat better when you beat on the motor - my logic for using full synth in my modded turbo car. I would have to work to cook it spooling the turbo.
But even more important than dino vs.synth is making sure you just change it at good interval and change the filter - this keeps motors alive more than anything.