I'm still in awe that you ran the engine with a low oil pressure warning. The odds of your pressure switch crapping out at the exact same time as you getting an oil leak aren't particularly high.

Also justifying it with the Carly reading is fine isn't a good excuse in my mind. The oil pressure SWITCH (under vacuum pump), unless I'm mistaken, is purely for an idiot light. The oil pressure SENSOR that the ECU would use, and Carly reports, could very well be in a different location (I don't know where). As in you could have pressure at the sensor location (before leak) but low pressure at the switch (after leak).

For you and your engine's sake I hope I'm wrong.

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'08 X5 4.8i - 196k
'15 i3 REX - 95k - Blown AC compressor

'98 323is - 170k - Garaged
'94 325i - 208k - Sold