I don't recall either oil or O2 being a problem on the 5 Bahrain trips, but I recall one of the guys on the way back nearly ran out of O2. I am not sure if he had done something to deplete his O2, but when checked by the docs at Binbrook he had very little O2 in his blood. 54 (Phantom) had to fly round the UK for 15 hours before flying Coningsby to Singapore on, I think, Ex Bersata Perdu. I think that this was to prove the Speys would not run out of oil.