#6 not firing!

I plan to pull the valve cover soon anyway because it needs to be replaced its leaking like crazy! Actually has created a sort of "oil cookie" on the crossover pipe of the exaust! LOL Oil is baked on the exaust pipe. Now that I think about it, it sounds like a fire waiting to happen!
Any how, Ill do the compression test next then Ill pull the vale cover and see what the valve train tells me. I was just wondering if there were something that is common to the slant 6 that may be the issue?