Hi guys, most of the previous problems are sorted, last Friday the freebie had a major service, double flush on oil, (had'nt been done since head gasket) it has uprated hg on, new problem is after a round trip of 180 miles today, not caning it either i've got back, gone to change a bulb & noticed water reservoir is brown, checked it & it has oil in water, I must stress no water in oil filler cap looks/smells & is the same as before, nor did i overheat at all even sat in traffic for 45 mins, Any help would be cool