我是考慮jd全球購 德國的那個castrol 5w30 edge 金罐的，

FS 银美没有BMW认证 但是 粘度合适 剪切合格可以用 我用了一个周期了 N20的机器 过几天保养还是继续银美孚FS版机油

我朋友的328 n20機頭 用5w30 的Castrol 油有LL01 認證，10L 一大桶， 感覺也好，他說， 不過 長效 跑1萬 9k 這樣換。 美版0w40 fs版 黏度很合適的其實，，12.9

這樣？ 其實 應該 沒太大所謂，，但是金美孚 國內版本 是沒PAO啊，， 之前看論壇有人po出來的貼說，只有新加坡 才有， 我覺得問題不大，，只是我現在 幾個能用在n55 的 mobil 和castrol的油我都想試試， 看看 哪個感覺更好，，motul那些我暫時沒考慮，等試完這幾個之後就試，

那还是试试嘉实多吧，试的话选0W40 因为0W的机油工艺最好。

经常跑没有问题的，习惯就好了。

哈哈， 也沒什麼，其實兩個都能用，， 兩個都買 輪流試試吧，

纠结就用原厂的吧！

https://540ratblog.wordpress.com/ 北美机油抗磨排行榜，看最后一节：29. Eliminating BMW M3/M5 Rod Bearing Failures，这是出处

以前看过老外一个关于这个话题的讨论帖，找不到了，或者你可以花时间找一些关键词，记得用谷歌搜索。关于高粘度机油在冷启动带来大量磨损这是基本的机油知识，尤其是宝马长久以来给出的10w60，这个想都不用想用在普通民用发动机上面是多大的灾难。在铸铁缸套时代也更可能更多的是为了减少市区走走停停带来的机油消耗，因为铁和铝的热膨胀系数不同的原因。作者指出，用10w60是给m3做的最糟糕的事情，没有之一。当然我是没摸过m3，所以只能随便看一眼没办法继续研究了。

网友回帖：

And below is a related message that I received from one of my BMW Blog readers:
.
Hi Rat,
.
Some time ago I wrote here that I changed the oil viscosity in my BMW S54-6-cylinder-M-engine from the suggested 10W60 to 0W40 using Mobil1 New Life.
.
Now I have covered some 50,0000 kms since then (before it was 5 W 50 for two oil changes, equaling approx. another 15.000 kms). Engine has reached 92,000 and I decided to have the rod bearings replaced.
.
Some owners make frightening experiences on this occasion: Wear patterns far from normal, rubbed-through layers with shiny copper exposed.
.
Guess what?
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“Nothing to worry about here. Still enough life in the first layer of the bearing for another (!!) 90,000 kms. Wear pattern isn’t very unusual for this engine: Even and over the whole surface of the bearings each of them alike, no spotting visible.”
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Rooted back to two aspects: Quickest possible build-up of oil flow after cold start due to “0W” and best possible “oil cushion” in the bearing due to high flow with reduced temperature throughout the whole bearing.
.
There were worries about the enormously high pressure in the VANOS-system were that the oil would shear down too quickly and thus failure of the VANOS would be the result. In addition much higher wear on the valve train would be the inevitable result.
.
How wrong can that worry be?
.
No visible wear on camshafts and valve train, VANOS working perfectly and very quiet even after cold start up. Valve clearances have to be adjusted for the first time in more than 90,000 kms.
.
So – lesson learnt from practical experience:
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Oil flow and protection by a good quality engine oil are much more important than “steady oil pressure” at the highest possible numbers.
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As for using the suggested super thick 10W60 – Myth busted! It is not needed.
.
Best wishes
Markus
.
*************
.
Then here is my response back to him:
.
Hi again Markus, it’s good to hear from you.

Thanks for sharing your information. I always appreciate the feedback I continue to receive here and on Internet Car Forums, from many people who have also experienced the excellent results that you have, from using what I’ve been recommending all along – thinner quality motor oil.

You provided such good information, that the next time I update my Blog, I will add your experience at the end of my Tech Article “29. Eliminating BMW M3/M5 Rod Bearing Failures”.

Take care and feel free to get in touch any time,

540 RAT

我不用金美孚有一个原因：因为含PAO成分大，用久了会造成油封收缩，用几个周期后最后用含脂机油一周期，因为酯类会膨胀橡胶，PAO是收缩，虽然效果有点轻微，但是久而久之造成气门油封橡胶老化或渗油也不太好！这个是我看专家研究讨论出来的

应该用0W30，A3/B4或C3等级有BMW LongLife认证的机油。比如美孚一号ESP，X1，0W30，福斯GT1 ，5W30 ，C3等级机油。
一般而言欧版的 0W/5W30机油更合适一下。上面这款美版的0W40看参数也可以用。粘度12.9也不算高。

現在用0w40 金美孚，覺得有人反應沒5w30 那麼快，，糾結咯，， mobil 0w40 fs版本的 12.9的黏度 對比 金美孚13.5 （14.2？）也不差吧？

我現在在用0w40 金美孚，我覺得 真的 和原車的油比起來 黏度高了，，反應沒那麼快了，，金美孚不知道是14.2 還是13.5 反正 這個美版0w40 是12.9的 肯定 好一些，， 糾結著，哈哈 我考慮 jd全球購那個 嘉實多5w30 有認證。