Again? Did you mention this person before? You're saying I'm arguing with someone that hasn't even commented? I'm saying we've cleaned a lot with ATF, including engines. I didn't realize we were doing the impossible.Well, again, we can ask the formulator who has commented on this @MolaKule because you are arguing with his expertise on this matter, not my opinion. And ATF +4 is synthetic, it has to be under license. Both ATF +3 and ATF +4 are Group III based products with a strict recipe for the license.