I have the same problem... I put some liquid moly additive to the coolant and now it consume the reservoir every 2-3 month... The leak began 2 month after warranty was over...
Sorry to hear, have you taken it in to get looked at yet, the leak could be coming from the head like mine, or it could be somewhere else. worst case is it mixes with the engine oil and kills the engine. don't wait to long to get fixed. even though it is over the warranty, they may work with you like my dealership did. please post what you find out so we can keep track of this..I have the same problem... I put some liquid moly additive to the coolant and now it consume the reservoir every 2-3 month... The leak began 2 month after warranty was over...