What should the average coolant useage be for this car? It was a bit low when I had the car mapped about 3 weeks ago so it was topped up. I've done about 2K miles since and its now only just in the tank itself - so its used a fair bit. Now I can't see if its leaking anywhere but could there be an issue with the coolant being used so quick? It was fairly hot over the weekend and spent most of Friday and Monday on various motorways if that makes a difference.