I do 5K intervals on my 2020 QX60 (VQ35DD) using Rotella Gas Truck 5w-20 and I do NOT see the same blackening of the engine oil. I also didn't notice that symptom when the dealer gave me a freebie using Mobil synthetic 0w-20 (not Mobil1). I continue to use 5w-20 for my climate and have considered 5w-30 like I use in my VQ35 powered Infiniti sedan, which remains quite clean at age 17 and nearly 130K. I don't do ANY city driving. Maybe that has something to do with it. Also, in my experience my older VQ35 runs noticeably stronger and probably cleaner on top tier premium fuel vs. regular.
I need to go THICKER than 5W30 ?
That depends on whether you care about fuel economy or engine protection. Don’t let the manufacturers fool you into thinking you can have both. If you use their 0w-20 then you’ll be buying a new car within like 50,000 miles which is EXACTLY what they wantI need to go THICKER than 5W30 ?
They'll last longer than that but 0w-20 has shown to accelerate timing chain wear and on turbo engines It can decrease the bearing's life unless the oil temps are known and they dont pass 190f. There are some vehicles whos oil temps hover around 170-190 and in those cases a thinner oil will act like a thicker oil at higher temps. But most of these modern high efficiency engines run the oil hot so I'd use something thicker. My low mileage 2021 escalade is already burning 0w-20 so i stopped using it.
I don't have to own one of these engines to understand one. I don't have to use a thick (or thin) lube to understand the benefits and limitations, either. What's your point here? That unless we own something we can't understand it?
The point is first hand experience specific to a particular engine. That's not poppycock.
