[forcefed]

Just got my results from blackstone, engine had 5200 miles on it at the time of the oil change and the oil had 4000 miles on it. I'd like to see what the oil looks like after 10000 miles as bmw recommends but not sure i want to go that far between changes. Will be doing my own oil change between the free ones from bmw.
I put in motul specific ll-01 fe 0w30 this time and will sample that right before i go in for the free oil change and compare it to bmw's tpt oil.

[GrannyShiftG80]

So 4000 miles on OEM oil and viscosity has already thinned out below spec ?

And BMW wants 10,000 miles between oil changes lmao

[CarPoor]

Originally Posted by GrannyShiftG80

So 4000 miles on OEM oil and viscosity has already thinned out below spec ?

And BMW wants 10,000 miles between oil changes lmao

Viscosity would probably go back up by 10K miles from oxidative thickening.

[Dawgz]

This is exactly why a good 5w40 should be used.

[GrannyShiftG80]

Originally Posted by Dawgz

This is exactly why a good 5w40 should be used.

motul 8100 xcess gen2?

[Berzerker]

Originally Posted by Dawgz

This is exactly why a good 5w40 should be used.

I can see why one might want 5W instead of 0W (only if you're not in a colder climate), but what's your rationale for 40 vs 30?

[GolfCoyote]

Man that’s wild to me they recommend a 0W. I get most modern cars do, but most performance oriented applications are still using 5/10/15. I think when I had my supercharged coyote Mustang Ford recommended 5w50.

[forcefed]

Originally Posted by GolfCoyote

Man that’s wild to me they recommend a 0W. I get most modern cars do, but most performance oriented applications are still using 5/10/15. I think when I had my supercharged coyote Mustang Ford recommended 5w50.

Wouldn't that depend on bearing clearances?

[GolfCoyote]

Originally Posted by forcefed

Wouldn't that depend on bearing clearances?

Important but heat is equally important. At least on the Coyote you’re taking a high compression engine and shoving extra air down it making a ton more heat so the thicker oil pays off.

[TopJimmy]

forcefed
Any tune on that engine?

Your analysis seems to reinforce our suggestion to change oil every 5K miles for best protection.

I suspect that your Motul Specific will yield a similar wear and dilution profile. I would keep to the 4-5K OCI instead of using thicker oil. Don’t get me wrong…Motul 8100 is great stuff, but I wouldn’t switch to it just to combat dilution.

[forcefed]

Originally Posted by TopJimmy

forcefed
Any tune on that engine?

Your analysis seems to reinforce our suggestion to change oil every 5K miles for best protection.

I suspect that your Motul Specific will yield a similar wear and dilution profile. I would keep to the 4-5K OCI instead of using thicker oil. Don’t get me wrong…Motul 8100 is great stuff, but I wouldn’t switch to it just to combat dilution.

Nope, stock. I'll definitely stick to 5k mile changes.
Would be nice to have some more oil analysis from others.

[Dawgz]

Originally Posted by GrannyShiftG80

motul 8100 xcess gen2?

Yes

[Dawgz]

Originally Posted by Berzerker

I can see why one might want 5W instead of 0W (only if you're not in a colder climate), but what's your rationale for 40 vs 30?

40 vs 30 cause 30 already gets so thin on these M motors. Situation was the same in the V8 S63.

[NicolasB]

What does Blackstone charge for this type of service?

[davidmct-M3]

Originally Posted by forcefed

Nope, stock. I'll definitely stick to 5k mile changes.
Would be nice to have some more oil analysis from others.

By way of comparison i had mine tested around 10k miles here in the uk.

No problems. I did change my oil though as interval is 19k miles here.

[forcefed]

Originally Posted by davidmct-M3

By way of comparison i had mine tested around 10k miles here in the uk.

No problems. I did change my oil though as interval is 19k miles here.

Strange that i have fuel in the oil after 4000 miles but you have none after 10000 miles. Was this with bmw's tpt 0w30 oil? Whats your daily driving like, long/short trips?
Mine are mostly short trips.

[davidmct-M3]

Originally Posted by forcefed

Strange that i have fuel in the oil after 4000 miles but you have none after 10000 miles. Was this with bmw's tpt 0w30 oil? Whats your daily driving like, long/short trips?
Mine are mostly short trips.

That might be it. I’m probably 70% long journeys (for us in Uk 100 miles round trip &#128512 though i have driven 1000 miles on holidays. Rest stop/ start in cities.

I tried to give it a good break in though i did redline it once or twice by accident. Lots of cycles up to 5500 limit.

Usual BMW oil 0W30. No major extremes of temps in uk.

[eugenebmw]

Originally Posted by forcefed

Wouldn't that depend on bearing clearances?

That what I heard too. Today’s advanced engines are built with much tighter tolerances than their predecessors. The clearances between the crankshaft journals and main bearings are tighter, for one. This is purposely done to allow modern engines to use lower-viscosity motor oil, like 0W-30. Thicker oil may not flow quickly enough (Canada winter cold start). The oil won’t form a consistent lubricating film, allowing metal-to-metal contact and wear. Engine was designed specifically to use a lower-viscosity oil, in this case 0W-30. Its lower viscosity allows it to flow faster and fill the tiny clearances between parts, leading to a durable, consistent lubricating film.

Not only that, but the engine will waste energy pumping the thicker oil, reducing fuel economy. Since thicker oil doesn’t transfer heat as well as thinner oil, operating temperatures will increase, possibly leading to accelerated chemical break down (called “oxidation“) and harmful sludge and deposits

[eugenebmw]

Originally Posted by forcefed

Nope, stock. I'll definitely stick to 5k mile changes.
Would be nice to have some more oil analysis from others.

Me too. 5K oil and filter change for me too. At the end it is a high output turbo engine. Oil change is my cheap insurance and peace of mind.

[BrendanZ0402]

That KV100 is alarming! Good thing the S58 doesn’t get too hot even at the track lol. I’ll be putting motul 5w40 either Xcess Gen2 or Sport when the free maintenance runs out. The redbull bros drift team runs 15w50 300v in their cars FWIW and their rod bearings looks fantastic

[DonkeyKong]

Originally Posted by BrendanZ0402

That KV100 is alarming! Good thing the S58 doesn’t get too hot even at the track lol. I’ll be putting motion 5w40 either Xcess Gen2 or Sport when the free maintenance runs out. The redbull bros drift team runs 15w50 300v in their cars FWIW and their rod bearings looks fantastic

Thank you for posting this, I've been trying to find out what weight oil they have been running in their S58 motors. I have 5W-40 Xcess Gen2 I'll be changing to next oil change (Hopefully today). I think this is a great oil for the S58, especially if tuned.

[SE7EN335]

Originally Posted by BrendanZ0402

That KV100 is alarming! Good thing the S58 doesn’t get too hot even at the track lol. I’ll be putting motion 5w40 either Xcess Gen2 or Sport when the free maintenance runs out. The redbull bros drift team runs 15w50 300v in their cars FWIW and their rod bearings looks fantastic

Where is the source to show that they ran 15w50?