Oxygen consentration

[Jouxeur33]

Hello i have a quick question i'm in the bonanza TP at FL300, i know its supposed to be FL250 ceiling but i'm just trying lvl 300 i've set only the pilot 95kg with oxygen one but the oxy consentration keeps decreasing, is it normal or a bug ?

[Black Square]

I hope you're having fun up there, haha. Coincidentally, the reason that aircraft is limited to 25,000ft, when it clearly has the power to get much higher, is due to the lack of diluter-demand oxygen masks, which you might have seen in some of my other aircraft. The face masks that are required for flight above 18,000 feet are insufficient to keep the body properly oxygenated above 25,000, hence the declining SpO2.