Hi,

I just bought a 01 cadillac sts with 203,000 is there anything in particular I need to watch out for?I heard gm fixed the head gasket issues in 01 and also got a few other kinks out as well?

Also, my oil is black, what type of oil do I use and how many quarts?is mobil 1 full synthetic ok?

And where is the oil drain plug located?I was just briefly looking under today and couldn't find it.

Thank you so much guys in advance