The oil in the 06 E90 330d has been loaded above the recommended level.

[John278]

Greetings, everyone. I have had my vehicle for about one month, during which I have engaged in a combination of short trips and longer journeys.

Upon purchasing the automobile, I discovered that it had an incomplete service history. As a result, I have just performed an oil and filter replacement.

Upon completing the oil exchange, I discovered that around 10 litres of oil had been drained from the engine. Upon refilling the container and regularly monitoring the dipstick, it required around 8 litres of liquid to reach the maximum level.

Considering the excessive filling of the item for a minimum of one month, and perhaps since the last documented maintenance service around one year ago, are there any potential issues or attempts by the sellers to conceal any problems that I should be aware of?

[IrvesBMW]

The M57 engine has a maximum oil capacity of 8 litres. However, it is important to note that overfilling the engine with oil will not conceal any underlying issues if the engine is already in poor condition.

[John278]

Impressive! Thank you, that is comforting. I will assume that it was just neglected during the last modification and thoroughly review everything once again on my own.

[dave783]

Ensure to monitor the oil level closely, since it may rise excessively due to frequent regeneration. This may be a significant concern, particularly when the vehicle is engaged in short trips.
Thank you.

[John278]

That seems to resemble black magic! Is it possible for the oil level to grow spontaneously? What is its origin?
I possess a substantial amount of knowledge to acquire. 🙂

[Matt865]

Fuel dilution refers to the process of mixing fuel with a substance that reduces its concentration or potency.

[John278]

Indeed, I have recently been studying the process of Diesel Particulate Filter (DPF) regeneration. It has come to my attention that in the event of a failure, the surplus fuel that is injected during the regeneration process might potentially accumulate in the engine oil sump. I will monitor it closely.

[dave783]

According to Matt865, the substance is diluted with diesel when regeneration processes fail. I had a 635d vehicle that underwent excessive regeneration cycles, resulting in a gradual accumulation of oil levels. Hopefully, your situation is only a result of over filling, which is really the most probable explanation.
Greetings

[DreamWeaver]

Does it have a diesel particulate filter (DPF)?
Our 2007 320d model does not have one, but the later 2007 models have. However, I am uncertain whether the 6-cylinder engine variant has one.

[Howard_silver]

My 2006 E90 330d was equipped with a Diesel Particulate Filter (DPF). To determine whether your vehicle has a DPF, inspect the tailpipes. whether they are straight, it indicates the presence of a DPF. Conversely, if the tailpipes are pointed downwards, it suggests that the vehicle does not have a DPF.

[DreamWeaver]

What is the matter?