Yes, I know it, of course. Also on "autobahn" not most drivers drive >160kmh (100 m/h). Unlike of loom on Youtube, its not a country fully of hellbents.
But those typically problems with those engines becomes now more frequent. For me, concerning FE-nonsense. Anyway, for me its not a problem with speed and revs, but rather of torque (or driving style...).
I have no idea for which drive situations FE or 508 (BMW, VAG) are ok. Or lowered HTHS values. Madness...
For sure, it saves no 0.13gal fuel in a year, opposite 5w-30 LL-04/504-507. And you get no more than +4hp of 350 with FE. And maybe it kill your engine parts? No thanks.
Crazy. Crazy hysteria regarding WLTP. Similar story like 75W or 70-75W MT oils, in gears, which are construed to works best with 75W-80/85. Ok, no words about Dexron/Mercon ULV...
For me, those oils are only safe in units with plasma coatings. The most of us (or not?
) can't buy a cars with plasma coated gear or engine parts. Or is those technology meanwhile common in average cars? Not to my knowledge.