Quote:
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.
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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!