That's a good example. Medicine is primarily an empirical science, and the profession believed for so long that ulcers were caused by stomach acid caused by stress - whatever- that they REFUSED to believe that ulcers could be caused by bacteria even when confronted by evidence derived through rigorous experimentation. That said your conclusion that coolant temperature has a major effect on NOx is not based on rigorous experimentation.

Physics, chemistry, and engineering are sciences. I'm not so sure about medicine.

Considering that this revelation about the cause of ulcers only happened only about 20 years ago, I wonder how far we have come in medicine since the middle ages, and most advances in medicine - like artificial organ, limbs, and arthroscopic surgery are due primarily to the efforts or engineers, not physicians.

Duke