There was probably some miscommunication, there is no reason the oil pan spacer would cause the oil pressure light to come on. (Unless there was a leak sealing the pickup tube spacer to the pump, rather unlikely but possible)
I suspect that the cause and effect might be reversed from your explanation... a dip in idle to the point that the engine almost stalls can cause the oil pressure light to activate. Since the oil pump is crankshaft driven, when the engine speed is too low it will not generate oil pressure.
Also, the post about a tech plugging in and measuring pressure.. they were not being honest with you. The 370z does not have an oil pressure sensor to check the pressure. It merely has an oil pressure switch, which only activates to turn on the oil pressure light when pressure is very low.
Last edited by phunk; 11-15-2016 at 01:22 PM.
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