Rolls Who?
Oil vapourizes above 150C...fact. Prove to me it does not!
Maybe RR units go through a hell of a lot of top oil. No one is counting how many top up tins are poured in because no has to record these additions. Not sure if they even issued the A-380 with an "away pack" to use in top ups.
If oil tecnology had moved on the T970 series would not be in the mess we find it.
Seems to me RR think they are minor deities. They are allowed to product test using the public.
They think they can have THREE turbine discs running and expect the oil to be able to handle a 50% increase in frictional load and temperature.
Moreover they are paranoid about taking bypass air to cool the oil. All in all I get the impression they are in this business cause they always have been. They have leagacy rights to over ride basic physics.