BMW M54B30 - Does it NEED a Euro-rated oil?

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I'm sure I will get yelled at, but the search function just isn't getting me the answer I am looking for:

Asking for a friend: New to the friend is a 2002 BMW 330i with the M54B30 inline 6 with about 130,000 miles. This vehicle is in the US, and has lived its whole life below the rust belt. It has always run XW-30 oil. This vehicle is now moving to the great frozen north where it will become a daily driver (at least while its running). So, here is my question:

Is the BMW LL rating a requirement? Is a EURO rated oil a requirement? What are pros and cons all that? And, what weight would you use? I've read some up it to XW-40.
 

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I'm sure I will get yelled at, but the search function just isn't getting me the answer I am looking for:

Asking for a friend: New to the friend is a 2002 BMW 330i with the M54B30 inline 6 with about 130,000 miles. This vehicle is in the US, and has lived its whole life below the rust belt. It has always run XW-30 oil. This vehicle is now moving to the great frozen north where it will become a daily driver (at least while its running). So, here is my question:

Is the BMW LL rating a requirement? Is a EURO rated oil a requirement? What are pros and cons all that? And, what weight would you use? I've read some up it to XW-40.
Yes.

I'd run M1 FS 0w-40 or Castrol 0w-40, even though the 0w-40's aren't officially LL-01 anymore, they were for like 2 decades and are perfectly suitable for that engine.
 
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I'm sure I will get yelled at, but the search function just isn't getting me the answer I am looking for:

Asking for a friend: New to the friend is a 2002 BMW 330i with the M54B30 inline 6 with about 130,000 miles. This vehicle is in the US, and has lived its whole life below the rust belt. It has always run XW-30 oil. This vehicle is now moving to the great frozen north where it will become a daily driver (at least while its running). So, here is my question:

Is the BMW LL rating a requirement? Is a EURO rated oil a requirement? What are pros and cons all that? And, what weight would you use? I've read some up it to XW-40.

In my opinion it doesn't need an LL-01 oil if you shorten the drain intervals. It does need a minimum of a 3.5 HTHS. That is likely going to require a 0W30 or 5W-30 Euro or a 40 grade. I unlike many am unperturbed by the thought of using a 0W-40 after BMW no longer accepts 0W oils as long as warranty is a non-issue.
 
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In my opinion it doesn't need an LL-01 oil if you shorten the drain intervals. It does need a minimum of a 3.5 HTHS.
this, except you can keep the drain intervals BMW’ has always been conservative. any A40 or 229.5 is a 18.5/20k mile oil period.

american ilsac/dexos1 is just kneecapping yourself so why even bother
 
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How far north? If it's Canada, this is your best bet. $29Cdn dollarettes is the sale price every month or two.

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I personally own an newer n52 which in eu was specced for ll05w30. in the us it was ll01 5w40.
For the M54 i would also use 5w40 with 3.5> hths A3 B4 gasoline spec oil. The eu ll04 was C3 spec and more focused on being compatible in the diesels as wel.

All the oils i always used in my bmw where also always mb229.5 approved. A lot more oils are MB approved then bmw so maybe that makes your search a little easier.

I have used Shell (penzoil) in my car with good results over 60k miles. Yesterday i switched it to Fuchs although that me be harder to get in the states. In eu its relatively inexpensive to get.

If he does a lot of short commuting or slow driving/cold temperatures keep an eye on sludge in the cylinder head. (like all cars) And if needed shorten the OCI's to fit that.
 
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The M54 was spec'd for a HTHS of 3.5 or higher (ACEA A3/B4). You could probably get away with using any 5w30/5w40 which as ACEA A3/B4 on the bottle and it will perform as well or better than an circa 2000 oil which had BMW LL01.

Alternatives might be Mercedes Benz 229.50, Porsche A40, VW 502 and perhaps ACEA C3 oils like Mercedes Benz 229.51, VW 504/511, Porsche C30/C40
 
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