[RS3100]

For me, the normal level is 39-42mm, but I have a 2.0 litre VEA petrol. I have seen other post referring to around 19mm oil levels on the diesel VEA engines, which I find rather odd, as understand that the block casting and sump are essentially the same, although I know that the correct diesel engine oil volume is about 0.3 to 0.7 litres less than the petrol engines (newer petrol engine sumps have a lower capacity than the original castings). The main issue with oil changes on these engines is that if the new level differs from the old level appreciably, the software on the car can display low oil level messages even though the level is normal, or even if it is overfull, the reason being that the monitoring algorithm on the car works on averaged readings over several trips rather than in real time, and gets confused by a possible sudden change in the oil level (although the mm measured level via EOBD is real time).

Volvo dealers have a tool and/or can use a function in VIDA to insert a temporary false "correct" oil level into the car after an oil change, which persists for a short period of time until the oil algorithm has had time to recalculate a new value.

Did you measure the oil level before draining the old oil? That is what I do. I first measured it after the first dealer warranty service and noted the level (42mm). It hadn't changed 12 months later when I did my first oil change. I measured the exact amount of oil drained from the sump and filter, then refilled with the same quantity, ran the engine briefly to fill the filter, waited for the level to settle, then took another reading and slowly added less than another 0.1 litre of oil to bring it to the exact same level as before. I have done this four times now and have had no issues with spurious level readings.

Bottom line though, if you did the change a few days ago, have driven the car more than about 30 km since and have not had any warning messages either to add oil or informing you that an oil service is required, or the red warning lamp, the oil level must be within tolerance.

If it helps, these are the readings I took from my car on refilling, but obviously yours being diesel may differ:

 

[RS3100]

Sounds fine to me. If you had no warning before the oil change, put in a similar amount and have had none since, I would say everything is fine. There's a 0.8 litre range between minimum and maximum levels on the VEA engines, and maximum capacity is 5.2 litres. The engine operates the same whether the level is at the minimum or maximum mark; there's absolutely no advantage to trying to fill to absolute maximum, in fact on a modern diesel it can lead to additional problems connected with DPF regens.

So I would say everything is fine. The only issue is how sensitive the onboard oil level algorithm can be about changes in oil level such as might occur following an oil change. You've not had that, and the DIM will notify you if the level reaches the minimum or exceeds the maximum. It's only the DIM level calculation for the display graphic that is averaged from the sensor readings. The sensor reading themselves are accurate to within 100th of a millimetre and transmitted in real time.

 

[RS3100]

I changed the oil and filter on my 2016 VEA engined D2 a few weeks ago and put in 5.2litres.
The gauge now reads 'Oil level ok' and I know it is the correct amount I put in so that is good enough for me!

5.2 litres is the maximum normal capacity of the diesel engine though. Because it is impossible to drain all of the oil out of the engine, there will always be some oil in galleries etc. inside the engine, adding 5.2 litres would mean that it is likely to be slightly overfull, although not critically. It is also good practice to leave some leeway on modern diesel engines due to the possibility of oil dilution during DPF regenerations, which could increase the level above maximum between services and risk the phenomenon of diesel runaway.

There is no advantage to aiming for the maximum mark on the dipstick when topping up or refilling oil, the engine operates just as effectively anywhere between minimum and maximum, so unless I have an engine that I know uses a lot of oil fairly quickly, I always aim for a level half to three-quarters of the way between min and max.

On one of the diesel vehicles I own, the oil capacity is quoted as 5.9 litres, but adding that amount of oil at an oil change always results in overfilling on the dipstick. The dealer network only add 5.4 litres at an oil change, leaving the level around the three-quarter mark on the dipstick and avoiding any possibility of regen rising level issues.