Ah, I know why Porsche uses Mobil 1 … it’s a global company, the deal was signed Not Here.
And if whatever the manufacturer recommends is available everywhere, the deal’s worth more to both the supplier and the manufacturer.
It’d be
way more annoying if Porsche recommended something like, I dunno, Elf oil here.
My info on Nulon & Penrite comes from a pair of engine & head builder people who’ve got a solid reputation (from a performance POV - apparently a lot of racers use them but also for road cars), they recommended Penrite or Nulon to me, from a cost-is-irrelevant point of view. Their experience related to how much (and the type of) wear they were seeing on the stuff they worked with. They also couldn’t tell me one was any better than the other.
I used to Mobil 1, but partially because it was a very good full-synthetic without paying top dollar. It was like … I guess 70’s Sony or 80’s Toyota.
I didn’t stop using it because I didn’t think it was good or anything like that; it was purely due to no longer having a car where a good synthetic was worth using. The Volvo engines I had/have will happily go a million km’s if you change the olde-worlde dinosaur oil in them at 10k km or 18 months. And I think the first car I had again which warranted a really good full-synthetic was the SSVR, by which time I’d had all that work done on the archaically-engined project-car which is where the contact with engine- and head-building folk came from & hence all the Penrite & Nulon recommendation.
In the end, for my use & especially for a road car, I agree … I think oils of the quality we’re talking about are all good, and given the values of our cars, paying a tad extra to use the top-notch-quality oil which gives us the warm-and-fuzzies is worthwhile, you’re gonna burn that price difference in fuel over the next <100km … having said that, $37/5L of Castrol Edge looks like an extremely good deal at SCA, wonder if they’re trying to clear the shelves and the Mobil One is going to completely replace Edge at SCA?