Back to 3 bar in N??? That's something there, when HOT (80*C) mine idles around 850 in N with an oil pressure around 1.5. If you're shooting up to 3 there could be some blockage in an oil passage somewhere. Not trying to panick you, but it's indicative..in a V8 at least.

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RIP: 80 300SD
RIP: 79 450SEL
2002 E430 4matic (212,000km)
2002 ML500 'sport'

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