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in maserati you don't have oil pan, extra 2 qts will not do any damage,
its a ferrari motor in it you should take it to the guys who works on them
but your right, if there is a problem in crankcase ventilation system (PVC) , wen PVC valve gonna get stuck it will suck oil in to the intake manifold, it even might hydro lock the engine
car might misfire on higher rpms, would be hard to start, will loss power, sometimes doesn't want to rev up, might not hold idle
also look for any vacuum leaks