Quote:
John H said:
Wrong - the most accurate check is when the engine is up to operating temperature. The best time is when refuelling - put in the fuel, go pay for it and when you return to the car and turn the key, up comes an accurate read-out.



John,
Not sure you're right here.
It is indeed the case for the Turbo and GT3 because their engine have an dry sump lubrication system.

It is not the case for the 997, hence why you have to measure the oil level with the engine cold, so that the oil has fallen from the cylinders heads into the engine oil reservoir.
With a warm engine, oil will be all around the engine pieces and hence the level meter will not give an actual reading. This is why, when you perform an oil check with engine warm, the onboard computer takes 5 minutes instead of a few seconds, to give time for the oil to fall with gravity, still too short though.

You're right in the case of the Turbo/ GT3 though. Totally different lubrication system.