I recently change my oil and my spark plugs and notice the far right spark plug have some oil on it when I pulled it out. It's only a little, should it be a concern?

Also a few months back for some reason that spark plug was loose, not sure for how long I have had it runnning loose. I think it could be a factor that this might have burned the o-ring in it?

 

It can cause a spark which is dangerous.

Why dont you get the seal replaced

 

I am not sure how to get it done... hell I am not even sure if that's the problem. I need to know how I could diagnose it.

 

lol that an easy one if your driving a teg this is a common problem i had it on my too. u need to replace your valve cover gasket the lil round one inside your valve cover that seal around the spark plug but if your replace those its best to change all your gasket on your valve cover. if any question ask me