Just wondering if anyone uses X-1R engine treatment. Ive heard very knowlegable technitions say that its great. I used to listen to a car radio show Car Clinic hosted by Bobby Licas and he says its a great additive. Its used by NASA for friction problems they have had. Its the only thing that worked for them. I personally use it. Its supposed to make less friction, making your engine more efficiant, and last longer. I fugure if it works as its supposed to, its good insurance. Just wondering if Im the only one who uses it in my LT1.