Overfilling will definitely cause huge issues.
I overfilled mine earlier this year and caused major problems. It would not idle correctly and after a serious idle issue the idle reset itself to about 1100 rpm.
I let the car drain for an extended period of time to try and clear the air bubbles caused by the overfill. When I drained the oil, there were a LOT of air bubbles. I then had to pull the battery cable to reset the ecu.
Due to all of this, I no longer ever fill to the Full line.
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Borla S-Type | Motordyne | Z1 (lots) | South Bend | K&N | Nismo/Nismo S-Tune | Eibach | Aerojacket | Fujimara | Spl | ZSpeed Performance | Kenwood-Infinity-Sound Ordnance | Whiteline | Ecutek | Hotchkis | Clazzio | VQ Vortex |Morimoto XB |Dynosty Tune 329.64hp 265.73 ft/lb
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