I used it. No apparent effect on cats. I haven't had any codes.

 

Have you asked Mike if he'll cover damage to peripheral parts?

 

It is my underatanding that he would. Mike has said that he "will work with me" on a few occasions so long as I follow his requirements listed in the warranty agreement. One of which is to run zinc additive during the first 500mi before changing oil.

Anyone else have one of his engines who do not live close to him in Oklahoma and had to deal with any warranty issues? If so, what happened and how did it go?