Spark Plug Tube Replacement

[utkayaker]

Hoping to change the tubes in my 2.7 liter on Saturday.

I have read some say just use motor oil to lube the new O-rings, but won't the oil actually cause them to break down?

I heard someone else say use silicone paste from a hardware store (which I have never used before) but am concerned this may make the tube "stuck" inside of their respective "sleeves"

I didn't buy the expensive Porsche grease (obviously).

Please let me know what you have used and why.

Thanks!