Oil looks ok, but oil in antifreeze. Car slows on incline. What causes this?

on 1997 Chevrolet Cavalier

What causes one plug to blacken

Asked by for the 1997 Chevrolet Cavalier
2 answers 2 comments
Auto. trans.?
YOU DONT SEE THE CONNECTION DO YOU????
TO BAD!!!
Cavalier and Caravan..........
poss intake leak.what motor do you have?
2.2 manual transmission