Oil in intake manifold
Hi
I did change my spakplugs on my 3.5 v6 from Bosch platinum to a new plugs to Torch iridium a major Improvement fuel consumption and power does anyone know these plugs .But noticed that there is oil in the intake manifold it is a concern. Anyone knows what is the problem and how to fix it .Assistance will be appreciated.

Have a lovely day

Ben

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