Yes, 5W-30 SuperSyn is what I've been running. However, it seems that 0W-40 is a better choice if you fit any of these cases:
You race it at all
You start it in freezing temps
You start it often (short trips)
The thinner cold viscosity means that you get less wear on startup, and the thicker hot viscosity means you won't get it too thin when really cooking at 6k rpm. Now if you live in the south where you never start it below 50 degrees F, and don't race, then there's no real advantage. The cold viscosity will be damn close. There isn't a huge difference in the oils, but if they are the same price (or very close), and it might help on those cold mornings, why not?
