Porsche 911 GT3 R 2012 Technical Manual page 13

3.4.3. Checking the oil level
3.4.4. Filling capacities
The engine oil temperature must be over 80°C and the engine running at
idle speed (approx 2,200 rpm) to measure the oil level correctly. The oil
level must be between the two marks on the dip-stick. The distance
between the two marks corresponds to 1 litre of engine oil.
An excessively high oil level can lead to oil entering the induction
tract.
If engine oil is added it should be noted that this oil only flows slowly into
the oil tank through the dip-stick guide sleeve. Therefore the oil level
should only be measured again after waiting for a few minutes.
The engine oil level must be checked regularly and corrected
when necessary especially when the engine is new. Oil pressure
signal drop outs in the MoTeC data logging are a clear indication
for low oil level. Therefore the oil pressure must be carefully and
regularly monitored. (e.g. with MoTeC). NOTE: THE OIL PRESSURE
IS MEASURED AS ABSOLUTE PRESSURE. That means at the
engine speed 0 the oil pressure equals the ambient pressure.
New engine:
With oil filter change:
Without oil-filter change
11.0 l
8.3 l
8.1 l
10