Yup! Runs on 200 - 800% excess air, needs no after air injection, catalytic converters, special injection and all that garbage. They took an old 1938 diesel Caterpillar tractor engine out of a museum and fired it up and it beat every engine emission criteria in effect without any add-ons. Wish I had kept the numbers for you.
It was so good that it attracted the attention of the enviro-nazis who had to drum up an entirely new set of criteria to use to judge it. Pretty soon, I expect them to outlaw any flame over a certain temperature if they can't shut down society any other way.