之前在一个坛子里面的帖子里面参与了一个关于宝马Longlife-04（类似奔驰MB229.51）标准机油的讨论，爬了一点BITOG上面的帖子，内容如下：

搜搜宝马这个新的认证：

http://www.bimmerforums.com/forum/showthread.php?1422995-BMW-LL-04-oil-is-not-to-be-used-in-U-S-gasoline-BMWs

从上面这个帖子展开：

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那个帖子LZ的看法：

I just put Amsoil 5W-40 European formula in my car. No complaints, great oil. However, it is a BMW LL-04 oil, and after some research, it looks like BMW does not want gas BMWs outside of Europe to be using LL-04 oil. This is due to the high ethanol content of gas specifically in the U.S. How ethanol gasoline and LL-04 oil combined are bad for our cars, I don"t know. But I just want to pass along the information and see what you guys think. I searched and didn"t find other relevant threads.

哥们儿加了安索5W-40欧洲配方给他的车子。没有任何不满意，确实是好油。是符合BMWLL-04标准的油，经过一定的研究，哥们儿发现，BMW似乎不希望欧洲以外地区的Gas（汽油机）车子使用这个认证的机油。

这可能是源于美国汽油中的高乙醇含量。酒精乙醇汽油+LL-04机油组合在一起对他的爱车有什么影响，他也不知道。他只是转载以下资料希望其他朋友看看。

关于LL-04FE

参看：

长效-04 机油

此机油设计主要用于优化柴油引擎的颗粒过滤器的使用寿命。此类机油特别设计给带有颗粒过滤器的柴油引擎，不推荐使用在其他几乎所有的BMW引擎上。类似LL-01、LL-01FE机油，这个新标准满足BMW当前最严格的品质要求。LL-04机油严禁使用在欧洲以外的BMW火花塞点火引擎上。

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衍生帖子的部分网页内容：

BMW Oil Specifications

BMW Longlife-98 (BMW LL-98)

Special long-life engine oil, approved by BMW. Also meets ACEA A3/B3, API SJ/CD, EC SAE 5W-40. Usually required for BMWs manufactured before MY 2002. Obsolete since 2009.BMW Longlife-01 (BMW LL-01)Special BMW approval for fully synthetic long-life oil. Product meets ACEA A3/B3 and API: SJ/CD EC-II. Usually required for BMWs built after MY 2002. Can also be used where a BMW Longlife-98 oil is recommended.

BMW Longlife-01 FE (BMW LL-01 FE) 

（由描述可知，FE的尾标识意味着更低的燃油经济性，估计是Fuel Economy的简写）

Fully synthetic long-life oil with fuel economy properties. Oils meeting this specifications must have a low HTHS viscosity to meet the manufacturer"s fuel economy requirements. These oils are only suitable for the following engines: N1x, N2x, N54, N55, N63, N74.

must have a low HTHS viscosity

描述的应该是HT=高温、HS=高转速？？？

后面这个不太肯定。就是这个机油标准需要满足高温高转速下的低粘度，以达到燃油经济性。并且有一个适应引擎的列表。

BMW Longlife-04 (BMW LL-04)

Special BMW approval for fully synthetic long-life oil. Viscosities are SAE 0W-30, 0W-40, 5W-30 and 5W-40. Usually required for BMWs equipped with a diesel particulate filter (DPF). Can also be used where a BMW Longlife-98 or BMW Longlife-01 oil is recommended.

文中也可以看到基本上也是主要针对柴油引擎的DPF进行了优化设计，优化排放的。黏度方面，似乎也没有到20这样。

BMW Longlife-12 (BMW LL-12)

Special motor oil for certain approved gasoline engines and the following diesel engines only: Nx7K1, Nx7U1, Nx7O1 from model year 2013. Not suitable for engines with 2 or 3 turbos.BMW Longlife-14+ (BMW LL-14+)Special motor oil for the following gasoline engines only: N20, Bx8 from model year 2014. Not allowed for diesel engines.

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刚才那个LZ引用的另一个帖子：

MB 229.51: Not good for gasoline engines?

I"ve seen a few snippets here and there indicating that the 229.51 spec is for diesels with particulate filters, and that 229.51 oils should not be used in most gasoline engines. Anyone know what"s up with this?

LZ发现有人说MB229.51认证的机油主要针对还有引擎的DPF设计，最好不要用在大多数的汽油引擎上。知道为啥？

回答：

I believe this comment was strictly in relation to gasoline quality issues outside of Europe. Similarly to these MB specs, BMW advises against the use of BMW LL-04 spec"d oil in gasoline engines outside of Europe, citing questionable gasoline quality. Whether this argument really holds water, I have no idea. I, too, would like to hear what are the real reasons, if any.

有哥们儿回答：他相信那根欧洲以外地区的汽油品质有很大的关系。

类似MB229.51这样的认证，宝马的LL-04认证机油也不推荐在欧洲以外的汽油引擎上使用。主要也是考虑到了当地的燃油品质问题。

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另一个帖子：

BMW LL-04 Not suitable for BMW petrol engines

Re :Castrol Edge Sport 0W-40 from Austarlia

This oil is BMW LL 04 and states that it is NOT SUITABLE for BMW petrol engined cars.

Does anyone know why ?

LZ问：澳洲的嘉实多Edge Sport 0W-40，这个满足BMW LL-04标准的机油声明，不适合BMW汽油引擎的汽车。

回答：

I think it was discussed somewhere on the board and it had something to do with the ethanol content of US (and/or non-euro) gas. Not sure why that would matter, but I"m pretty sure that"s the explaination.

EDIT: Here"s some more info.

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1673160

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1564784

An official BMW TIS document in one of those links says (in regards to LL-04 oils) "They must not be used outside this area (the EU, Switzerland, Norway and Liechtenstein) as problems are often encountered with fuel quality"

回答的兄弟说：这个以前在坛子里面讨论过了，是为了满足美国（包括或者其他非欧洲地区）燃油中的乙醇成分。不确定为啥乙醇汽油会有这个问题，但他坚信这是一种解释。

以上两个link帖子中有一个BMW官方的TIS文档（针对LL-04标准）明确阐述：此标准类别机油可能因燃油品质引起异常情况，故严禁在以下地区（欧盟、荷兰、瑞士、列支敦士登）以外的地方使用。

另一个回答：

LL-04 might not be the best oil outside of Europe, especially for long oil change intervals - have a look at this discussion and post from Jag:

LL-04机油可能不是欧洲以外地区机油的合适选择，特别是在长换油周期的前提下，请看下方的讨论

Originally Posted By: JAG

The starting TBNs of LL-04 oils are generally lower than for LL-01 oils. Sulfur in gasoline is a big cause of TBN depletion. Low TBN with ethanol laden gasoline further increases the chance of engine corrosion. I think that BMW does not think LL-04 oils in general can hold up in all states in the U.S. for their recommended OCIs/time intervals at a high enough frequency. MB has recently changed back to a higher TBN oil specification (229.5) in the U.S. and their reason was they found unsatisfactory engine protection with MB 229.51 spec oils here and said it was due to the ethanol in gasoline.

LL-04机油的起始TBN值一般而言低于LL-01标准的机油。燃油里面的硫含量是TBN消耗的一个重要原因。低TBN加上燃油中的高乙醇含量将进一步加快引擎的腐蚀。我认为BMW并不认为LL-04机油标准可以满足美国所有州的实际使用需求（应该就是燃油品质不同），故而他们在推荐的换油周期比一般的推荐周期高得多。

奔驰最近已经在美国将机油标准从MB229.51换回MB229.5，后者是一个更高TBN的机油标准。他们是理由：奔驰发现MB229.51机油无法在含有乙醇的汽油中队引擎提供足够的保护。

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1486305&page=1  

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结论出现：

从我们车子的角度出发，机油的厂方认证，不是越新越好，不是越环保越好。

所谓的最新的标准，往往都是为了迎合更高的燃油经济性要求、更低的排放要求。

而并不总是基于是否能对引擎有最佳的保护，是否对机械设备驾控有最好的保障。

类似奔驰：

MB229.5是标准的引擎长效机油认证

MB229.51是在229.5基础上降低了TBN，减少对DPF污染的一个标准。

后果是，较低的TBN首先迎合不了中和燃油中硫的需求，同时在乙醇汽油的环境下，还无法对引擎腐蚀产生足够的保护。

如果是宝马：

LL-01对应的MB229.5的状况

LL-04对应的是MB229.51的状况

而LL-04FE怎是更加增加了对燃油经济性的提升

所以————

众所周知欧洲是一个对环保有着近乎狂热追求的区域，并且也在以环保这个概念制作壁垒。

同时他们所做的很多东西，比如机油在环保低排放要求下做出的成品，可以说也有着非常明确的地域特色。

比如我们都在讨论的福斯GT1，他的不同产品通过了MB229.31、MB229.51、BMW Longlife-04等认证标志；

我印象中力魔的机油也很多通过MB229.51

在奔驰的认证标准里面，31、51皆为的机油降低了硫磷含量，说是对三元好，但更低的TBN对燃油的要求非常高，你要达到奔驰所要求的换油周期，首先得有奔驰夸张的引擎机油用量；还要有欧洲牛逼的燃油品质。

如果你的引擎4缸机用了3L的燃油，那即使在欧洲，请不要按照MB提示的2.5W公里保养，因为他的机子4缸用6L，目前最新的机器4缸得用7L机油，人同样一发动机机油，TBN总量就是比你多。

如果到了我们国内，燃油品质的劣化，会让这个机油的衰减大大加速。

你要说这些欧洲的优质机油好不好，很好！！！但是在国内，请参考一下奔驰4S的换油推荐周期（国内奔驰4S基本使用MB229.5标准的机油），按照TBN数值的多少进行相应的递减吧。

毛估估如果金美孚支撑1年1W，那GT1这个过了229.51对就打个7折8折吧

今晚突然兴起，仅供各位看官参考。

如有不同意见，请勿口诛笔伐，先行谢过各位大侠的不杀之恩！