Quote:
Originally Posted by Killerfish2012
Dude 5W-30, is just the wrong oil for these motors. Direct injection engine spinning to nearly 9,000rpms, will just murder any oil. While I agree that 10W-60 (especially Castrol TWS), is just too thick, they did the switch most likely because they wanted you to start out at a very high KV 100, so that by the time you change the oil (approximately 15K miles or whenever the oil indicator flags it), you still have some viscosity left. Note that the 10W-60 by 15K miles will shear down to almost a 5W-30, which is why you don't want to start out with that.
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Sorry, I think you missed the context of my post. The engine discussed in the post is the S54, which is not direct injected and has a redline of 7900. There was no switch for S54 for any reason other than engines blowing up. Owner's manuals were printed calling for 5w-30 for months.
Further, if we talk about S65, that engine is not direct injected either and the redline is 600 shy of 9000.