[edycol]

Originally Posted by Sandro95

I use the Motul Ester Sport 5W50 in my 335is and it works great. I change the oil all 8-10k kilometers(5-6k Miles). No problems since 3years with this oil.

You don't need such oil. Actually you are being counterproductive here

1. It is high HTHS oil with some 4.4cp. N54 needs 3.5-4cp. What you doing is creating unnecessary heat and drag. Your turbos need bit more time to spool. Basic rule if lubrication: as thin as possible, as thick as necessary.
2. Sport is only API certified, which mean Noack limit is 15%. N54 has issues with CBU and you might be contributing more than necessary.
3. BMW engines are oxidation monsters. Sport is ester based which means it has higher oxidation than street oil.

Sport is good oil if you spend a lot if time at the track and when I mean a lot, I mean every weekend.
Get Castrol Edge 0W40!

[Sandro95]

Originally Posted by edycol

You don't need such oil. Actually you are being counterproductive here

1. It is high HTHS oil with some 4.4cp. N54 needs 3.5-4cp. What you doing is creating unnecessary heat and drag. Your turbos need bit more time to spool. Basic rule if lubrication: as thin as possible, as thick as necessary.
2. Sport is only API certified, which mean Noack limit is 15%. N54 has issues with CBU and you might be contributing more than necessary.
3. BMW engines are oxidation monsters. Sport is ester based which means it has higher oxidation than street oil.

Sport is good oil if you spend a lot if time at the track and when I mean a lot, I mean every weekend.
Get Castrol Edge 0W40!

Thanks for your answer, I didn't know that! By the next oil change I will try the Castrol Edge 0W40.

[edycol]

Originally Posted by Sandro95

Thanks for your answer, I didn't know that! By the next oil change I will try the Castrol Edge 0W40.

This made me think; which country are you in?
If EU country, go LL04 oil. N engines were always LL04 in Europe. If you want thicker oil go Motul X-Clean 5W40 GEN2. It has HTHS of 3.9cp. LL04 is Low-SAPS oil and it will reduce amount of CBU on your intake valves. Not prevent it, but reduce it.

[HB E90]

Originally Posted by edycol

You don't need such oil. Actually you are being counterproductive here

1. It is high HTHS oil with some 4.4cp. N54 needs 3.5-4cp. What you doing is creating unnecessary heat and drag. Your turbos need bit more time to spool. Basic rule if lubrication: as thin as possible, as thick as necessary.
2. Sport is only API certified, which mean Noack limit is 15%. N54 has issues with CBU and you might be contributing more than necessary.
3. BMW engines are oxidation monsters. Sport is ester based which means it has higher oxidation than street oil.

Sport is good oil if you spend a lot if time at the track and when I mean a lot, I mean every weekend.
Get Castrol Edge 0W40!

What do you think of the Castrol Edge 5w-40 Euro that is LL01 sold at walmart and others?

[edycol]

Originally Posted by HB E90

What do you think of the Castrol Edge 5w-40 Euro that is LL01 sold at walmart and others?

Mediocre.
Pennzoil Platinum Euro 5W40, Motul X-Cess 5W40 GEN2, Quaker State Euro 5W40 (repackaged Pennzoil) and Valvoline European Vehicle 5W40 are all better.
QS Euro goes $18 for 5qt on Wal Mart web site.

[Sandro95]

Originally Posted by edycol

This made me think; which country are you in?
If EU country, go LL04 oil. N engines were always LL04 in Europe. If you want thicker oil go Motul X-Clean 5W40 GEN2. It has HTHS of 3.9cp. LL04 is Low-SAPS oil and it will reduce amount of CBU on your intake valves. Not prevent it, but reduce it.

Thanks for the information. I'm from Germany. Next time I will try the Motul X-Clean 5W40

[FimbulWinter]

Which oil weight should I use for N52B25 in 30 to 40 celsius tropical climate, 5W-40 enough or should i go 10W-40?

[w23drw]

hi all i have a 318 2.0 diesel has now done 114k looking to do a oil change and been told by a mechanic to use 10w/30 as will help due to the mileage

specs are as below
SAE: 10W-30

Classifications Met: API CJ-4, CI-4 PLUS/CI-4, API SM

help be appreciated

[chris55552]

I went with Liqui Moly 5w 40 a week ago, liking it so far. First time I deviated from the castrol 5w 30. Gosh dang it runs smooth, it maybe a little placebo but it sure seems smoother. Then again the N52, is by far the smoothest engine ive ever driven. Its just the definition of smooth and refined. Ill tell you something else that works that I use, and this will probably stir up controversy but who cares and that is liqui molly ceratec. It makes my engine smoother, quiter and it feels just fraction more responsive and thats just my experience. I love the stuff!!