Heard about the big stink in NASCAR....mystery substance found in the fuel system.
Evidently some tech inspector reached inside an intake to check for something they always check for...who knows what...anyway, he brought his hand back out covered in some substance he couldn't identify. They sent it off to some NASCAR lab (if you can believe there is such a thing), but they aren't saying what it was. They just said an Oxygenator of some sort that will increase octane.
I'm betting it was Moth Balls in the fuel tank.