I've been using the 5W-30 special tech in my car. I'm going to 5W-40 of some kind next spring before track season. For the winter I'll still run the 5W-30 for any track events or fair weather drives, although I won't be driving my Supra regularly this winter.
Thanks brother! @KBGT really hit it with his post above
I wish someone would have said it that simply long ago. But then again, as you know, I’m pretty dense when it comes to this stuff. They may have in a different way. 
The values are good but that oil does not have LL01 or LL04 BMW oil rating or specification listed. The @edyvw guy on the oil forum once said, "the B58 has the timing chain on the back of the engine and BMW includes as part of their specification a timing chain wear test". That little fact was enough for me to find an oil with good/great KV100, HTHS, and BMW specification meeting LL01 or LL04.
Another thing I have seen @edyvw and others say is that climate does not matter when selecting grade oil. I have mixed feelings about this because devil is in the details. What I think they mean is that unless your cold start temp is super low, where the oil will not flow, the oil is excessively viscous to perform properly. Most vehicles have oil to coolant heat exchanger or oil temp is closely related to coolant temp. So daily driving at 0C your oil temp gets to lets say 110C, also daily driving at 30C your oil gets to 110C. My mixed feelings come into play on the track, and data logging is the key. If you track your car at a theoretical 0C and engine oil is 120C, so what is it at 30C? if it still is 120C then I agree ambient temp and oil weight is irrelevant. I would wager that those hot summer days on the track push the cooling system to the max and oil temps rise compare to winter temps.Th So if I ever make the plunge to put on a cool suit again and drive down here in the summer, I know I‘m covered with these oils. When over 120 degree track temps, at least it wont be my oil (or brake fluid) that breaks down, I can look elsewhere
But I drive the car hard and plan on occasional track events.I have refer you to the oil forums, where they have been talking about the best oil for a tuned b58 for several years. Just FYI I run penzoil euro 5w-30 and 5w-40 because I can get them locally cheap. They meet LL01 the other LL04 and have good KV100 and HTHS values.So, this is all awesome info and has been helpful. I'm about ready to do my first oil change on my '23 and was planning on Liquid Moly 5w30 special tech, but this thread has me thinking differently.
I'm in central FL, so cold weather doesn't exist
What would be the recommendation you'll have for weight? And is there a better option that's more easily attainable at most automotive stores vs having to order LM?
Hmm. That's a shame because it is incredibly inexpensive locally. I'll take that into consideration and see. Thanks for the info.
I was also checking out the Castrol option as well since thats readily available around me too. Good to have a couple options.
What you just did there is exactly what I do, now that I know what to look for. I order the penzoil euro 5w-40 from NAPA and pick it up next day. If I ever run out and need some 5w-40 that day, walmart has Edge euro 5w-40 on the shelf. I have not used it but would without hesitation because LL01.
me said:New oil report!
- Total of FIVE track days on this oil
- Track day peak oil temps:
- 31 track days total on the car as of this report
- Day 1: 248F
- Day 2: 250F
- Day 3: 240F
- Day 4: 245F
- Day 5: 253F
FWIW, this is from the B58 Technical Reference Manual from BMW. It makes no mention of oil weight- just LL-01 or LL-04 approval.
