The OEM spec calls for a ester based oil which should be a quality synthetic. We like to use Redline synthetic oils or Joe Gibbs Racing oils for the VQ37HR. These are extremely sheer resistant fully synthetic oils. The Redline is an ester based oil and the JGR is a more advanced mPAO oil. I'm not sure what type of base stock the Castrol Edge is formulated from, but you might want to take that into consideration depending on what type of driving you do with the vehicle. Also if you have an oil cooler and aren't racing this information might not be quite as important, but expensive oil is still a hell of a lot cheaper than your engine!
Thanks,
Alex Goodwin
AlexG@motionlabtuning.com