M
MJM
Guest
...water in my oil!? I have had this car for three months. t started with a bit of muddy stuff on the ground. Turns out that the radiator overflow tank was overflowing onto the ground, and the coolant had turned to a muddy brown substance. I hoped the previous owner had mixed normal coolant with the dexcool, but it turns out that oil is getting into the coolant. The Cadillac dealer said it needs an oil cooler, but my local mechanic said he tested the oil cooler and that it is fine. He also said the oil cooler would cause water to get in the oil too, and there is definitely no water in the oil. What might be causing this?