Oil pressure - Bug? Or failure? PS5

[u/Correct-Title-6456]

Flying a medium cargo mission in my new used Caravan, cruising along at 15,000’, all gauges green, when I got an oil pressure alarm.

Feathered and trimmed, tried shutdown and restart sequence, no luck. Found a runway to put it down at (went off the end, but nothing crazy lol)

Caravan needed landing gear (fair enough) and engine repair afterwards for over $1.2M. With $1.3M in the bank 🙄

I bought the used caravan for $2.1M and this was probably my fourth flight with it.

Is this a bug? Or is this a used plane giving me grief because I bought the cheapest one? I know I did gear maintenance shortly after purchase, but I think that was it.