I think it is gasoline because that black is carbon, I have seen spark plugs with oil and the feeling is different, I think I should buy a new injector, I am using the 2006 oem, it may already have completed its cycle, don't you think?Man, that does look awfully black...you’ve got to decide for yourself man - is it oil on the plug or is it too much fuel/not enough air? It’s either one or the other. Best place to start is a leak down test IMO. You could be burning oil and not realize it.
How long do you go between oil changes?