A good example how rumors spread, grow and take roots on the way.
The BILD-Newspaper is infamous for it's low quality journalism, i don't know how your equvalent is called, but such "newspapers" exist everywhere. They write only crap, lies and exaggerations, and have more pictures than words in it.
And even BILD didn't write Koch killed the cats, they (falsely) claimed that he had used dead cats. It seems to me that somewhere on the way to you, CG, the information has changed
Another detail is that in the BILD-article they said 20 cats for one full tank, not for one gallon. I mention that only to show how information alters by passing through many mouths.
Actually i think Koch (the inventor) has made an interesting discovery: how to recycle waste into fuel. That probably won't solve the ecological problems, but it is an energy source the oil-corps might want to prevent from hitting the market too soon.
So what did that BILD article say again on the subject...