RE:RE:QuestionsI'm a little familiar how combustion engines work. Could one say for 100 % no hydrogen or exhaust gases aren't mixing with oil I would say no. For exacting numbers call the company and speak to Robert Maier or someone in engineering. They should have an answer for you. Also check to see if this is in either of the PIT or TUV testing papers on the site. GLTA Olde longs!!!