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Their reccomendation for Redline is excellent advice. Especially if you are going to be running it hard on a track.
It is accepted that if you are running a oil cooled turbo or super charger you need a synthetic, just to deal with the heat.
Although I have heard people tell me that you can go 3,000 miles with a good dino oil in a vehicle with a turbo, I would feel very uncomforable doing it.
Lots of deposits, the potential for lots of fuel dilution, and lots of heat. It calls for a good synthetic.
Are you going to be racing this on a track? Or just 70-80 mph on the highway? Knowing your driving habits, the make and model, and the engine will go a long way with what to reccommend.