914-F extremely high Oil Pressure on start-up

When I say a cold engine it is never below 35 degrees F. More typically 35-60 degrees F.

When the pressure drops it is more sudden than gradual. Specifically I start the engine, within 5-8 seconds the Oil Pressure rises. The gauge goes to full maximum on the VDO panel gauge. I let the engine idle for concern of stressing bearings with over pressure. After a short warm-up, oil temp just a little below 50 degreed C and water temp around 60-80 degrees C, I slowly advance the throttle and at a point around 1,500 RPM prop speed the oil pressure will drop right into central of the operating pressure.

Important to note: I am running MoGas not 100LL. I would never recommend 100LL on a 914. The lead buildup and 'coking' is very problematic. I've had to declare an emergency more than once due to 'coking' blocking the turbo oil sump and then blowing all the engine oil out the turbo bearing.