Coolant loss from overflow tank
Iím loosing coolant from my overflow tank. I believe Iím adding about 3-4 ounces to the overflow tank a month. I just changed the oil at my usual 3,000 miles interval last week. The oil looked fine, no foaming at the oil cap. There is no coolant smell in the oil or when the engine is operating. The coolant level in the radiator remains the same, and is full to the top.
I have had the car a little over a year. It now has 139,000 miles on it. The previous ownerí* records indicate the UIM was replaced about 8 years ago at about 101,000.
The car runs fine with good performance and good MPG. So, that being said, any suggestions on what to check out, or should I just continue monitor things?
Thanks in advance for any suggestions or direction.