I'm planning on doing a flush on the zetec this week. What type does everyone recommend? I've already decided I'm not going to get Super Tech do to the fact that the zetec runs somewhat hot already. Don't want to take the chance. My dad has a gallon of Peak thats been sitting on his shelf for a while. I've seen the posts about shelf life and I'm unsure if it should be used. Or is peak any good? It appears that the zetec only takes 1 gallon. Is this true?
