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Thanks for all the replies. The coolant reservoir drops from the full mark to the fill mark in about 4000 K miles. I check in morning when cold. No milkshake in the oil cap. I drive long drives every day. I have a 2 hour drive today and will check heat exchanger immediately after. I will...

Thanks for the replies. I did a search and didn't see anything in the first 7 pages, I checked the similar threads and see the heat exchanger for the hybrid battery could be it. I checked mine and it appears bone dry. I will fill and keep an eye on the heat exchanger. Thanks all

Frequent reader first time poster. I have a slight coolant leak somewhere in the main cooling system (not hybrid system) in my 2025 hybrid and I don't see any signs of leakage anywhere. It drops from the full mark to the fill mark in around 4000 miles. Has anybody had a similar issue and...