Please don't take this the wrong way, but if the manual reads 0W16 is recommended and 0W20 can be used, why are we into (4) pages of replies? Are you asking for a suggestion on which weight to use, or asking from those that are in the same boat as you and what they use?
Again, no offense.
My question was sort of open ended - primarily because the specs actually overlap - so from a viscosity standpoint a "thick" 16 could really be a "thin" 20. So given that - per the title does it matter? At that point its not even a thick or thin debate because they could in theory be almost the same?
I couldn't find any further comments on the 0w-16 vs 0w-20 viscosity overlap - maybe I don't know how to search. Lots of people say they won't use 0w-16 but given they overlap that lacks logic to me? I am generally in the higher viscosity / HTHS is better camp, but there isn't as much difference as say a 20 vs 30 weight oil?
I didn't want to lead but I was sort of hoping someone would bring up the difference between ILSAC GF6A vs 6B which is only for 0w-16 - and the supposed benefit for LSPI (its not turbo, but its high compression and VVT) and supposed benefit of valve carbon - even though it is dual injected. I haven't seen a lot of real data - just what the SAE says 6B is supposed to do.
I am certainly not loosing any sleep. The engine has 30K on it. I have run both 0w-16 and 0w-20 already, and I run short OCI, so in all practicality it likely doesn't matter. Just trying to get others input on how they think about these things - because that's how I learn, and how I form my own opinion - by logically agreeing or disagreeing with ideas rather than just listen to my own biases?