Why risk it?
That car is an expensive investment, and for a few bucks more get what the manufacturer requires. Car manufacturers have become MUCH more stringent when it comes to violations of warranty mostly because it hurts their bottom line, but in any case if you DIY oil and filter changes make sure you have those receipts just in case. Will you have a failure with another weight or type of oil, probably not, BUT if you do it will be a lot of hassle to get it sorted out if you use a non-approved oil type.