Renault Megan Senic 1.6 automatic 1998.
This car looses coolant. I can't find a leak, the engine oil is not emulsified, no problem to start, no misfiring or poor running on start up, there dose'nt seem to be much pressure in the system after 5 miles of running (I have carefully loosening the filler cap)

John Duff, February 2010