Oil on spark plugs

I went to change my spark plugs on my 1990 Toyota Camry delux 4
cylinder, and when I went to replace the spark plug, I saw quite a bit
of oil on the old plug. I think this might be a piston ring or a valve
seal, what do you think is causing this and how much do you think it
will cost for a mechanic to fix it?

Was the oil baked onto the porcelain insulator in the combustion chamber or
just on the threads?


"benkillin" <BennyHur@gmail.com> wrote in message
news:1128553290.603462.132150@g49g2000cwa.googlegroups.com...[color=blue]
>I went to change my spark plugs on my 1990 Toyota Camry delux 4
> cylinder, and when I went to replace the spark plug, I saw quite a bit
> of oil on the old plug. I think this might be a piston ring or a valve
> seal, what do you think is causing this and how much do you think it
> will cost for a mechanic to fix it?
>[/color]