The oil smell wasn't from rad, not even from head more either old spill or old leak towards the trannie and I thoroughly checked there's no water in the oil so head gasket seems sound - when I was doing freeway driving it stayed at temp no prob it was stop start that sent the needle north and a head gasket etc would have boiled regardless of speed and airflow so I'm hopeful a thermostat replacement will fix it..
I hope



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