I dunno if the hot temperature in Vancouver this summer has led to the low levels in my coolant reservoir lately. I washed my car about a month ago and I popped up the hood and checked both oil and coolant. I noticed the levels of the coolant reservoir was at L, so I filled it up with premix to F. Today I washed my car again and did the same and the level was at L again! I'm wandering if this is a normal occurence for turbo cars in this heat? I'm just hopping this is normal for the WRX and its not my head gasket going.