My car has covered 74500 miles . I had just driven about 15 mins on the motorway and as i parked up i saw exhaust smoke in the rear view mirror , i left the engine running and walked round the back and could see light blue smoke coming from the exhaust , it was'nt belching dark blue or smelt of bur'nt oil . Is this normal to see the exhaust fumes out of the exhaust. Oil level is ok and it drives ok temperature is ok as well. Just a bit worried about something expensive happening !!!