Thanks for the info on the overheating problem, I'll give the thermostat a try.
The oil light seems to come at various times, seems to be affected by going up (light on) and down (light usually off) hills. Oil pressure is constant at 3 bars, Oil Level just below full mark. Does this light indicate oil level problems or oil pressure problems ( I do not have a manual for the car). My thoughts were possible faulty sensor. Any information anyone has would be appreciated.