I'm curious if my engine temp is normal, it was 32 degrees out. It usually stays right below the half mark. Also my car idlles between 1000-1500 rpms at a nice steady idle. At cold start it idles higher. Is that normal ?

also I notice on the oil pan, around the oil drain bolt and around rear ac/heat lines some oil. But it looks dirty. Blackish. I check the dipstick multiple times and the oil seems to be where it has been since I changed it. Although I had a bad valve cover gaskets for long time and there is some sludge around the motor. I cleaned a lot but not where I can't reach. Idk from where it can be coming from or if it's old oil, or rain mixing with old oil and dripping down. It doesn't look like tranny oil because it's motor oil color but dirty looking. Should I clean it very very well with engine degreaser Nd see if it shows up again ?

also I notice on the oil pan, around the oil drain bolt and around rear ac/heat lines some oil. But it looks dirty. Blackish. I check the dipstick multiple times and the oil seems to be where it has been since I changed it. Although I had a bad valve cover gaskets for long time and there is some sludge around the motor. I cleaned a lot but not where I can't reach. Idk from where it can be coming from or if it's old oil, or rain mixing with old oil and dripping down. It doesn't look like tranny oil because it's motor oil color but dirty looking. Should I clean it very very well with engine degreaser Nd see if it shows up again ?
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