I did google on the problems on preve, major prob is the oil cooler hose for turbo bocor, all engine oil will leak out and the engine might need a top overhaul... scary man... and in long term if its a turbo engine, it might affect the gearbox and engine itself too.

I think I will not get a second hand preve turbo for now. It seems new persona is a better choice. I will wait and see. Im currently driving a persona SV. No major probs so far.