I just read the post on the reccomendation. It seems like the condition is to just not do it if you have cats, because it can damage them. Well, I'm about to change out my cat and put a new one in, so should I do this now? Thing is, what are the pros and cons of this thing? What does it do to N/As? Mine's an 88, using an 86 Zenki engine...

 

there are several posts on MMO check the search for it . i have use it in all of my vehicles and no probs/ both gas and oil it cleans out all the gum-sludge. put some in a 88 broncoll had a sticking lifter, 300 mi later no noise runs smoother too.

 

o btw i use it in my 88 vert too gas and oil!