Hey everyone, when I first joined I mentioned that my cougar was having the check gauges light come on around 4500rpm. When it came time to do the oil change I thought that might fix it, maybe it was low on oil. After the oil change, it started having the check gauges light come on around 3000rpm and the oil gauge goes to nothing. While changing the spark plugs today, I pulled one that was covered in oil, which is probably an o-ring failure. So, two questions. One - if it is an o-ring failure, what is the name of the part that I have to buy? Valve cover gasket? Two - is this what is causing the check engine light and low oil pressure, or do I have bigger problems than that?