Simple, one less thing to keep around. When it is getting time to change, I look and see if I have enough and order more on Amazon if I don't. 5 oils, now I have to figure out which I am low on, and hopefully not screw up the order. Yea, shouldn't be hard, but I am busy and it takes time I would rather not spend, and somehow make a mistake in my haste. I already have a hard enough time tracking all the oil filters, and don't get me going about the wiper collection I have now, having reordered because I thought I didn't have the right ones.
BMW B58 Engine Oil Recommendation
- Thread starter afree
- Start date
He is old and lazy like me and would rather only have one oil taking up space.
N55 can run LL01. I would just run M1 0W-40 or PP Euro 5W-40. There’s no quantifiable benefit to running LL-04. I choose to run LL-01 in my S55 because I prefer the selection of oils, the high SAPS levels, and don’t think intake valve deposits are meaningfully different. I saw an S55 torn apart on YT last week and the intake valves looked pretty good. Since that was an American engine it has been filled with LL01 full saps and the valves were still looking good.
try a mid saps oil!
Running castrol 0w-30 on my stock GR supra. Have a hybrid turbo from dynamic autowerx coming in soon rated to 35psi. Planning for reach a 600/600~ power/torque goal on OEM components. Any updates on recommended oils for mid to high horsepower b58 builds?
Last edited:
Well I ordered Quaker State Euro 5w40 LL04 at Walmart for $22. I believe it to be the same as Pennzoil Platinum Euro L
edyvw
$50 site donor 2025
QS5W40 is LL01. Not sure they have LL04 in 5W40.
I would run an SN+ or SP rated oil if you are going to massively turn up the boost just out of caution to avoid LSPI, not the Castrol which is an older high calcium additive pack. PP Euro 5W-40, M1 FS 0W-40, Motul X-Cess Gen 2 5W-40 (check the bottle, SP is very new), M1 ESP 5W-30, Motul Specific LL-01FE 0W-30 (not the 5W SN version). Edy may disagree with me but there are a few incidences of LSPI in heavily tuned B58 engines. Increasing cylinder pressure is going to increase the chance of it happening and I would rather have a lower calcium package since there is no downside to the newer formulations.
Higher capacity turbo should decrease chance of LSPI if anything.
edyvw
$50 site donor 2025
In tuned version I would go API SP or better yet, aim at MB229.52.
Motul X-Clean 5W40 GEN2 covers a lot of variables, MB229.52 and HTBS of 3.9mPas.
Maybe, just depends on when the boost hits, but yeah, you could be right. Still, there are a couple dead B58s where LSPI was suspected after tunes.
Yep, forgot about X-Clean.
I'm going to be running a flexfuel kit so hopefully it would mitigate LSPI events. Not that lspi isn't on my radar but i'm hoping i don't have to sacrifice the calcium levels in the oil as much. I try to fill up on quality gas, run injector cleaners, run mild octane boosters to try to reduce an lspi event from occurring. Also plan to run port injection as well. Mostly just focused on reducing component wear and reducing fiction.
Last edited:
How would that help?
Even tho im installing a flex fuel kit i was planning on running full e85. Which i hear helps with reducing LSPI. Can you explain a bit in depth on why lspi happens? I hear its from piston and top ring design, DI not having enough time vaporising fuel compared to port injection, fuel and oil emulsification, and cylinder turbulence causing calcium rich droplets to ignite the fuel.
Last edited:
i am a little confused..do you own a port or DI ? and you are saying that you are going to make it from DI to a port injection?
No, there’s no connection between octane rating and LSPI. It’s all about engine design, operation, and the oil.
4WD
$50 site donor 2025
Yeah - that’s old school knock - or what we used to call dieseling
That's not quite true. There is definitely an effect from the fuel but it is not directly connected to RON. It's possible that high AKI fuels happen to decrease LSPI frequency depending on region and formulation. For what it's worth, Lake Speed Jr. said that premium fuel decreased LSPI occurrence in tests he observed. This first paper linked showed a weak correlation.
https://www.jstor.org/stable/26273031
https://www.sae.org/publications/technical-papers/content/2018-01-1456/
Also check page 41:
https://aaltodoc.aalto.fi/server/api/core/bitstreams/f065d775-1419-4c98-aa52-24d32ef78830/content
for the b58tu its DI only, but you can run both with an auxiliary controller. All aftermarket intake manifolds for the b58 have bungs for running port injectors, water-meth, or nitrous. Is it possible to turn off DI and run it on purely port? Definitely not for idle and lower loads, but it possible as soon as you hit boost to shutoff DI to and run it purely on port. All in all, i have to accept the fact that avoiding LSPI the easy way is to run lower calcium levels. Thought perhaps running higher octane, cleaner fuels and adding in port injection could lessen the risk. Maybe run higher zinc and moly?
Yea thought that might be the case. Anything else we can do to mitigate lspi?