Hey gang, I am trying to pass an emissions test. What I learned is my CO2 levels are double what they should be. What I know is I have an exhaust leak and am burning oil. I am wondering what I can do myself to remedy the situation. I am mechanically competent as far as following step-by-step instruction, but I don't have the depth of knowledge required to fix it. Are the stop-leak oil additives a quick fix for the situation?