I was told that I needed to replace the valve cover and that spark plugs 6 and 7 were oil faulted.
My car has 142000 miles.
My car has an automatic transmission.
Hello - yes, oil leaks onto the plugs, or onto the coil boot over the plug, will cause misfires and poor running. I would recommend a valve cover gasket replacement by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, and replace this gasket, preventing future leaks and engine plug fowling.