Originally Posted by DERG
Oil vapourizes above 150C...fact.
It is not a fact, it is you talking nonsense.
A standard oil such as Jet Oil II has a flash point of 270°C. If you don't know what flash point means Google it. After 6.5 hours at 204°C, 3% will have been lost through evaporation.
For Jet Oil 254 the evaporation loss is even less.
Mobil Jet Oil II data sheet
You are also talking nonsense when claiming oil replenishment is not recorded. It most certainly is, as anyone who operates or maintains aircraft will know.