Hello, with my 2.8 JTD I had relatively bright orange coolant in it (Paraflu). Now they have filled me with dark blue coolant (glycantine) at the filling station. Somewhere I have read, however, that one can not mix red and blue coolant, but I can not say, that the paraflu was red, it was at least bright and now everything is dark blue. Why can not the colors be mixed, what can happen and counts the paraflu to the red group? Gru ss Gerd F.