I originally posted this in the mkv r32 forum. maybe I can get some more opinions here.
I've been noticing some poor gas mileage (22 mpg highway with cruise on in 6th the whole time) so I decided maybe I should change the spark plugs a bit early. I'm at 33k right now and the maintenance schedule says 40k. (2008 R32)
I went to change them today and I pulled out the plug in cylinder one and noticed there was oil on the threads...
Is this something I need to be worried about? I'm still under warranty and decided to put the plug back and get some advice. I need to take my car in for some leaking seals on the rear diff and I wondered if this is a problem. I didn't bother pulling the other plugs out to check them, I never saw this before on my 1.8T even after 80k miles.
If it's perfectly normal, then whatever. I'd rather be safe than sorry.