3.0 n52 when I got the car it had 5w-30 and the oil was leaking slightly. Changed 5w-40 and the leak stopped all together. Engine is smooth as butter
Castrol is really good considering cost and quality.
5W-40 is my preferred viscosity for the N52. If you are only topping off, virtually any API SL or newer oil will work just fine. If you are doing a full change though you should source a 5W-40 that meets BMW’s LL-01 specification.
As long as it’s a LL-01, you can put that in. I’m currently running that on my N52.
I replaced the plugs, oil/filter and air filter with oem parts when I got it. I\u2019ve been changing the oil at 5k intervals with the recommended Castrol 0w-20.
10w60 is the only oil you should put in these. If nothing else, you can usually find it at BMW automobile dealerships as that is what they put in the M3/4 series (or at least used to). Not cheap, but a lot less expensive than engine rebuilds.
I run Castrol (bought at Walmart), like my father and his father did before me...
I use it in my non deleted CJAA (dumb) but I haven't had any issues (yet) and it doesn't burn oil.
I did burn more Castrol than kroon. now i cannot get kroon and changed to Motul which seems to burn faster than kroon.
Oil leak. Thats my G20, had to fill like 3 times oil myself during 30 000 km. Went to service and apparently they found two separate oil leaks
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