It could be either. What is lacking here is proper "hands on" system diagnostics. If the OP has not done the oil pump piston and spring update, which was introduced specifically to address this issue, he needs to do so. If that doesn't raise the oil pressure, he needs to pull the oil pump cassette and examine the gears for pitting or excessive wear. If there is nothing wrong in the pump, the engine has become "loose", and is leaking the oil pressure internally, which requires a rebuild/replacement. But the ONLY way to know what is going on is to start looking........
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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