Ongoing car advice

[tomustang]

Rob, not positive since I never worked on a subaru engine before but if it's leaking at the plugs/valve cover then it should be the gaskets that go from the valve cover to plug hole.

One of the spark plug wires was so bad, that they had to replace it with a non-Subaru wire

This worries me, are wire works or it doesnt, its not like you'd even need a thicker wire since the same current will travel through it since it's computer controlled