Golf V 1.9 TDI overfilled oil

I own a Volkswagen Golf V 1.9 TDI, and unfortunately, after checking the oil level, I discovered that there was too much oil in the engine. After refueling at the gas station, which was done by an attendant.
At approximately 20,000 kilometers, a long-life oil change was performed using about 0.4 liters of oil. After driving about 1,000 kilometers, I checked the oil level, and it was about 3 mm above the maximum mark. My VW workshop noticed this, but didn't consider it a major issue. Subsequently, I used a suction device to remove approximately 0.25 liters of oil from the engine myself, bringing the oil level back to exactly the maximum mark. My question now is, could the engine have been damaged, or are there risks of long-term damage, especially since the owner's manual mentions engine damage as a result of overfilling the oil.

I would also like to know what the average fuel consumption should be after driving approximately 4000 kilometers, as my TDI is currently showing around 6-7 liters per 100 kilometers according to the multifunction display.
needs.

No, I don't think that small amount is dangerous.
From my experience, I know that vehicle manufacturers still tend to underestimate things.
due to safety concerns, no.
and 3mm is nothing.
Okay, at 1cm...
But with a diameter of at least 2 cm, your Pleul will definitely cause a noticeable bulge.

information without guarantee

Regarding your consumption, I won't say anything .

What is the MKB (engine code) of the Golf? What is the horsepower?

I once had 6 cm too much oil in my 1.4 TDI 6 engine due to a mistake. However, I only drove about 250 km with it. The turbocharger then lasted another 50,000 km. No other damage is visible (I can't say anything about the cat, but it passed the inspection without any problems).
I wouldn't worry about 3mm. Everything else has already been said...

Regards,

Olaf.

Unfortunately, after an oil check, it was discovered that there was too much oil in the engine.

How and when exactly did you check the oil?

Well, what gets upset about burnt oil is the catalytic converter (if it gets too much of it). However, you'd have to add a seriously excessive amount of oil for that to happen. I also had the 3 mm mark on mine, but I ignored it and I'm slowly realizing that the ATJ barely needs any oil (after 5,000 km, including some very fast highway driving, the oil level hasn't changed much).

Best regards, WarLord.

Regarding performance:
Volkswagen Golf V, 1.9 TDI, 105 horsepower, 240 Nm of torque.

Regarding the oil level check: it was performed in the morning with a cold engine.

Regarding the oil level check: it was performed in the morning with a cold engine.

Generally speaking, that's wrong!! You should check the oil after a longer drive (i.e., when the engine is properly warm). Check it 10 minutes after turning off the engine. Only this will produce an accurate measurement.

Julian wrote:

Oil is checked after a longer drive (i.e., when the engine is properly hot). Measure 10 minutes after the engine is turned off. Only

this will give a correct reading.
Um... and what should change compared to this measurement after a longer standing time (after complete cooling)?
Absolutely! Here's the translation:

"The 'only' confuses me, so I've bolded it."

Um... and what should change compared to this measurement after a longer standing time (after complete cooling)?:

Higher temperature lower density higher fill level (measured).

However, I'm also surprised to hear that it should be measured with the engine running. Especially since the oil temperature can fluctuate between 85°C and 110°C depending on the previous driving conditions. It probably wouldn't matter much if you measured between 0°C and 25°C, the difference would likely be similar. It's only a matter of what temperature the fill level markings on the dipstick are designed for.

Regards,
Private.

The engine is operating at approximately 90°C coolant temperature and 85°C oil temperature. It was designed for this purpose.

Oil is always measured in the warm machine, but only after a short period of inactivity, so that the oil has a chance to drain back. (A rule of thumb for mechanics).

Example. Oil level at maximum.

When I measure the oil level in my AWX immediately after a long drive, the level is approximately 1/3 to 1/2 on the oil dipstick (in the ribbed area). After some processing, the result is 1/1, which equals one, or full.

If I measure the oil level after, for example, 3 days, it will be significantly higher because the hydraulic components will have drained, and most of the fluid will return to the reservoir. Depending on the ambient temperature, the oil may also contract or expand.

When the machine is running, the ambient temperature is therefore not important; it only needs to meet the conditions mentioned above, which is usually not a problem.

Julian wrote:

If I measure the oil level after, for example, 3 days, it will be considerably higher because the hydros empty and almost everything flows back into the reservoir. Depending on the ambient temperature, the oil may also contract or expand.

Aha, that so much fluid is leaking out of the hydros, causing a noticeable increase in the oil level, was new to me.

I would initially consider the change in density of engine oil with temperature to be negligible... or what percentage change, for example, is there between 0 and 30°C?

But even if the oil expands significantly due to the ambient temperature: the oil pan volume also increases, so that both effects should at least partially offset each other in terms of the dipstick reading...

Aha, that so much fluid is leaking out of the hydros, causing a noticeable increase in the oil level, was new to me.


Just try it out; I often check the oil level and make sure it's exactly at the maximum mark. My car sometimes sits unused in the garage for up to 5 days, so I can easily check it then. Sure, I can take pictures of it next time.
This 0W-30 oil is so thin that even the plastic oil deflector in the head is slowly drying out. That's quite something.


The oil pan volume is also increasing...


Hm, how did you come to that conclusion?

I think Ulf means that everything expands when it gets warmer.

D. wrote:

I think ulf means that everything expands when it gets warmer.

Sure.
If you, for example, heat a hollow sphere, its internal volume will inevitably increase .