i noticed the coolant level keeps getting lower in the overflow tank, so i had the dealer checked. They did a pressure test and flush the cooling system but found no problems whatsoever. I did not see any coolant mixed in with the oil. What else is there to check?

 

bump for me having the same problem. no visible leak on freshly built motor but the overflow seems to need filling once a month.

 

i have the same problem.
but the car dont overheat and no leaks.
i think is normal.
because of the temperature

 

when you've driven your car for a while where it heats up pretty good, can you smell any coolant in the cockpit?

 

it was air trapped in the cooling system, i had it "burped" and never lost coolant again. But now my heat is not hot enough like it used to be, having it checked next week