So i noticed i have been getting low mpg. while driving i notice some hesitation while driving. this would happen if i was light on the gas but if i feed it more it stop it. so i park at my house and noticed that my driver side exhaust is spuddering just a bit like cylinder 456 could be misfiring or something. so i turn my car off and i pulled the passenger side # 3 and 2 plug out and i noticed that around the plug there was black stuff and was wet kinda like oil. and the black stuff went all the way down to the end of the tread. but i need to look at the other 4 plugs. so any suggestions about the black/oil around the plug. there bosch plug with less then 2k miles on it i got autolite dbl plat in the car. i know bosch is crap. but just wondering whats the black stuff. thks for the help

 

well if u have oil on the plugs a gasket or something is leaking therefore= take in to a shop and get fixed