Quote:
Originally Posted by CRBWS6
What type of evaporation rate are others seeing from the lower tank?
My upper and lower tank looked exactly like the OP's when I bought the car a few months ago.
I filled the upper tank and brought the bottom tank to fill line per the manual. This was 36 oz total add of 50/50 Dex.
Now, 1000 miles later the level has dropped about 1/2" - 3/4" below the fill line in the lower tank.
How does this compare? It seems like a greater rate of evap than my other vehicles with vented overflows.
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I have had to add coolant to the lower tank twice in 15k miles. It went from half full to maybe 1/4 full. I live in a very dry climate, so I am assuming it is just evaporating through the vent.