[Thorsveinyhammer]

Originally Posted by SE7EN335

I have personally tried both BMW LL01FE and Shell Helix Ultra/Pennzoil Platinum Euro 5w40 in my g80 m3 and can say with about 90% certainty that the BMW LL01FE 0w30 is too thin for the engine and assigned due to fuel efficiency purposes and the PPE/SHU 5w40 is a tad too thick for the s58 engine especially on cold start, its viscosity at 40 degrees is 79.1 which is significantly thicker than the BMW LL01FE at 60ish. I have settled with this engine oil for the time being: https://penriteoil.com.au/assets/pis...thetic)%20.pdf
The specs of this oil are absolutely perfect for every aspect: cold start protection, good protection at temp, high TBN for resistance against oil oxidation and high zinc ppm. The only downside of this oil is that it uses quite a bit of viscosity modifiers

How did you determine that the oil BMW is using is too thin?

[TrackM4x]

Supra owners (like me) switched to 5W30 because factory fill was 0W20 and oil consumption problems. For my G82 I also switched to 5W30 but go back to OW30 for winter months.

[SE7EN335]

Originally Posted by Thorsveinyhammer

How did you determine that the oil BMW is using is too thin?

From this UOA of the BMW 0w30 used for 2.8k miles in a M2 CS (not really apples to apples comparing a s55 to a s58 BUT both are similar engines and the S58 theoretically will degrade an engine oil faster as compared to an engine oil in a S55)

As you can see from the UOA, the TBN is obliterated after only 2.8k miles. At 5k miles, that TBN will be close to zero, putting you at extreme risk of engine oil oxidation/sludge accumulation. The TBN on virgin BMW 0w30 is about 9. The speed of the TBN dropping in an engine oil is increased when the engine oil is too thin in high load conditions. A w40 will offer greater protection at higher temps and high load conditions and won't drop your TBN as fast as on a w30. This is why as shown on UOAs where Pennzoil Euro 5w40 is used, the TBN still looks healthy after 5k miles in a N5X/S55/S58/B58

[GrannyShiftG80]

Originally Posted by SE7EN335

From this UOA of the BMW 0w30 used for 2.8k miles in a M2 CS (not really apples to apples comparing a s55 to a s58 BUT both are similar engines and the S58 theoretically will degrade an engine oil faster as compared to an engine oil in a S55)

As you can see from the UOA, the TBN is obliterated after only 2.8k miles. At 5k miles, that TBN will be close to zero, putting you at extreme risk of engine oil oxidation/sludge accumulation. The TBN on virgin BMW 0w30 is about 9. The speed of the TBN dropping in an engine oil is increased when the engine oil is too thin in high load conditions. A w40 will offer greater protection at higher temps and high load conditions and won't drop your TBN as fast as on a w30. This is why as shown on UOAs where Pennzoil Euro 5w40 is used, the TBN still looks healthy after 5k miles in a N5X/S55/S58/B58

Can I use 5W in winter or do I have to use 0w

[SE7EN335]

Originally Posted by Allenssmart

Can I use 5W in winter or do I have to use 0w

It looks like you are from Canada and winter temps over there are brutally cold (to me!)

I recommend using a 0w40 or a lightweight 5w40. Any of the big name 0w40s on the market would work for Canadian winter. Liquimoly High Tech 5w40 new formulation also has specs that makes it comparable to that of a 0w40

[GrannyShiftG80]

Originally Posted by SE7EN335

It looks like you are from Canada and winter temps over there are brutally cold (to me!)

I recommend using a 0w40 or a lightweight 5w40. Any of the big name 0w40s on the market would work for Canadian winter. Liquimoly High Tech 5w40 new formulation also has specs that makes it comparable to that of a 0w40

Is MOTUL 8100 X-CESS GEN2 5W-40 a lightweight 5w40? Otherwise I'd have to use a different oil for winter vs summer

[SE7EN335]

Originally Posted by Allenssmart

Is MOTUL 8100 X-CESS GEN2 5W-40 a lightweight 5w40? Otherwise I'd have to use a different oil for winter vs summer

The Motul 5w40 Gen2 are a heavier weight 5w40 than Pennzoil 5w40 or Liquimoly's. Pennzoil 5w40 has characteristics that make it as light as most 5w30s on the market, Liquimoly's one make it as light as most 0w40s on the market (if not lighter than some).

If you wanna stick with Motul, I would recommend using the 0w40 X-Max for winter. They are have good cold cranking viscosity and has the LL01 bmw approval. Otherwise, any of the big name brands would work

[TopJimmy]

Originally Posted by Allenssmart

Is MOTUL 8100 X-CESS GEN2 5W-40 a lightweight 5w40? Otherwise I'd have to use a different oil for winter vs summer

In your case (Canada) I would run Motul X-Cess Gen2 5W-40 in warm months and swap to Motul Specific 0W-30 LL-01FE for cold months (or BMW TPT 0W-30).

[ntran90]

Originally Posted by SE7EN335

From this UOA of the BMW 0w30 used for 2.8k miles in a M2 CS (not really apples to apples comparing a s55 to a s58 BUT both are similar engines and the S58 theoretically will degrade an engine oil faster as compared to an engine oil in a S55)

As you can see from the UOA, the TBN is obliterated after only 2.8k miles. At 5k miles, that TBN will be close to zero, putting you at extreme risk of engine oil oxidation/sludge accumulation. The TBN on virgin BMW 0w30 is about 9. The speed of the TBN dropping in an engine oil is increased when the engine oil is too thin in high load conditions. A w40 will offer greater protection at higher temps and high load conditions and won't drop your TBN as fast as on a w30. This is why as shown on UOAs where Pennzoil Euro 5w40 is used, the TBN still looks healthy after 5k miles in a N5X/S55/S58/B58

Sorry can you explain to me what I'm supposed to be looking at on this report? I'm kind of confuse, the diagnosis is saying that everything is normal.

[SE7EN335]

Originally Posted by ntran90

Sorry can you explain to me what I'm supposed to be looking at on this report? I'm kind of confuse, the diagnosis is saying that everything is normal.

Have a look at the Base Number on the report. After only 2.8K miles, the Base Number went from virgin 9 to 4.1. Had that oil being used for 5k miles, I daresay the TBN would be close to zero, putting you at extreme risk of engine sludge build up and high engine wear.

[Vegasg80]

Im sticking amsoil 5w30 signature series in mine when its time.

[vasillalov]

BMW OEM oil is most likely a specialty formulation from Castrol. BMW has maintained that relationship throughout most of its generations of cars.

I agree with se7ev335. You want 0W for cold start and then you want 40W for higger temps. I also have a 335i with N54 which has been a track dedicated car for me for the past 7 years. I also do regular oil analysis tests and watch things like a hawk.

1. I would never let my oil run through the recommended 10K miles. I will be changing my oil every 5K miles, even if it involves me doing it myself. I already have the oil I need for oil change at 6K miles.
2. I will be switching to LiquiMoly 0W-40, or similar oil with high initial TBN.

[Matt214]

I just got my 2024 G80 a week ago and am trying to get a leg up on the oil recommendations. I have a 2016 F80 and it has 107K on it. I've used Shell Rotella T6 5w-40 all of it's life and it runs as if new. Leaks nothing, doesn't use any oil, etc. I also remember the lead BMW tech mentioning that my valvetrain area was the cleanest he had ever seen when he had it removed (I think for a PCV valve change). I haven't read anyone mentioning the Rotella on here yet although I know a lot of guys used it on the S55 platform. I live in Texas where the summer heat broils us alive. I'm trying to get enough info to determine if I should stay with using the Rotella T6 or not. It is a damn good oil I know. One of the benefits of it is the detergents and the ability of it to withstand a lot of turbocharged punishment. It's marketed as an oil tough enough for turbo diesel engines. Anyone have any thoughts on it?

[SE7EN335]

Originally Posted by Matt214

I just got my 2024 G80 a week ago and am trying to get a leg up on the oil recommendations. I have a 2016 F80 and it has 107K on it. I've used Shell Rotella T6 5w-40 all of it's life and it runs as if new. Leaks nothing, doesn't use any oil, etc. I also remember the lead BMW tech mentioning that my valvetrain area was the cleanest he had ever seen when he had it removed (I think for a PCV valve change). I haven't read anyone mentioning the Rotella on here yet although I know a lot of guys used it on the S55 platform. I live in Texas where the summer heat broils us alive. I'm trying to get enough info to determine if I should stay with using the Rotella T6 or not. It is a damn good oil I know. One of the benefits of it is the detergents and the ability of it to withstand a lot of turbocharged punishment. It's marketed as an oil tough enough for turbo diesel engines. Anyone have any thoughts on it?

I personally wouldn't put Rotella T6 in my G80. It's low temp viscosity is quite thick, leading to premature wear during cold start and warming up of engine. It's high temp viscosity is fantastic and is actually on the heavier side of a 5w40 oil. That oil however is very good in cleaning sludge and oil varnish. I remember my e92 n54 335i which had 80k kms, was quite sludged up because the previous owner only adhered to dealer servicing intervals of 20k kms. I ran through about 3 oil changes of T6 (2000kms apart) and it cleaned it all up. After that I strictly ran Shell Helix Ultra 5w40. The s58 engine has tighter tolerances than the N54 so I would recommend 0w40 over 5w40.

[Matt214]

Originally Posted by SE7EN335

I personally wouldn't put Rotella T6 in my G80. It's low temp viscosity is quite thick, leading to premature wear during cold start and warming up of engine. It's high temp viscosity is fantastic and is actually on the heavier side of a 5w40 oil. That oil however is very good in cleaning sludge and oil varnish. I remember my e92 n54 335i which had 80k kms, was quite sludged up because the previous owner only adhered to dealer servicing intervals of 20k kms. I ran through about 3 oil changes of T6 (2000kms apart) and it cleaned it all up. After that I strictly ran Shell Helix Ultra 5w40. The s58 engine has tighter tolerances than the N54 so I would recommend 0w40 over 5w40.

Do you know if the tolerances on the S58 are a lot tighter than the S55 engine? I ask because the Rotella T6 5w-40 seems to have worked very nicely on the S55 M3. It's a 2016 if that makes any difference.

[SE7EN335]

Originally Posted by Matt214

Do you know if the tolerances on the S58 are a lot tighter than the S55 engine? I ask because the Rotella T6 5w-40 seems to have worked very nicely on the S55 M3. It's a 2016 if that makes any difference.

The B58 has tighter rod bearing clearances than the N55, it was so tight that BMW had to put a Z-coat to minimise any premature rod bearing wear on the B58. I believe the S58 also shares the same tight clearances as the B58

[Hit_Apex]

Originally Posted by BLKSAPPE92

After your car has run for 15-30min your Ow or 5w oil is no longer that it’s 20w-30w-40w when you’d actually be raging on the engine getting blow by not at cold start.

Toyota motors have went from a 20w to 16w
Bmw non performance engines 30w to 20w
Bmw performance engines 40w to 30w
All only for fuel economy purposes only.

The S55 had a option of 0w30 or 0w40.
The s58 is now only 0w30.

Just a point of clarification, M cars from 2000 to 2013 use 10W60.

[Hit_Apex]

I just put LM 5W40 in my S63TU4. It’s BMW LL01. I am done with BMW 0W FE nonsense. For the S58, I’ll probably try the 30W version but will decide when I get lab results back. Both cars run an E blend and live on the west coast.

[BLKSAPPE92]

Originally Posted by Hit_Apex

Just a point of clarification, M cars from 2000 to 2013 use 10W60.

Yes but the majority of those years all had rod bearing issues a 0w40 probably would have corrected that but Im not 100% on that

[BLKSAPPE92]

Originally Posted by Hit_Apex

I just put LM 5W40 in my S63TU4. It’s BMW LL01. I am done with BMW 0W FE nonsense. For the S58, I’ll probably try the 30W version but will decide when I get lab results back. Both cars run an E blend and live on the west coast.

What’s everyone’s problem with 0w oil at startup/cold engine thats the only time its 0w after 5-15mins of driving the oil weight is a 30w or a 40w for the entire time of driving the car

[TopJimmy]

You guys have forgotten that oil Winter Weight is determined by its viscosity at -22F (red line on chart). If both 0W30 and 5W30 were at +20F then they would both be 30 weight at that temp and above. Even at 0F they are both 20 weight. See the pix with info, courtesy of Amsoil.

[TopJimmy]

And since the S58 engine is so similar to the S55 and uses the same oils, this link should answer every question.
https://f80.bimmerpost.com/forums/sh....php?t=1764629