08-22-2023, 12:25 PM | #23 | |
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08-22-2023, 08:17 PM | #24 |
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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.
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08-23-2023, 05:29 AM | #25 | |
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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
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08-24-2023, 01:38 PM | #26 | |
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08-25-2023, 04:28 AM | #27 |
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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
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08-25-2023, 09:17 AM | #28 | |
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08-26-2023, 09:17 PM | #29 | |
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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
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08-27-2023, 12:19 AM | #30 |
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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).
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08-27-2023, 11:32 PM | #31 | |
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08-28-2023, 02:00 AM | #32 |
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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.
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08-30-2023, 07:00 AM | #34 |
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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. |
08-31-2023, 03:24 PM | #35 |
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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?
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09-01-2023, 03:55 AM | #36 | |
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09-08-2023, 04:24 PM | #37 | |
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09-09-2023, 07:43 PM | #38 |
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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
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09-15-2023, 03:38 PM | #39 | |
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09-16-2023, 07:05 PM | #40 |
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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.
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09-17-2023, 03:26 PM | #41 |
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09-17-2023, 03:30 PM | #42 |
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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
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09-17-2023, 04:17 PM | #43 |
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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.
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09-17-2023, 04:42 PM | #44 |
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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
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