For those that have not cleaned oily or greasy areas, the oil/grease floats on top of the oil as it is less dense than water.
When you look at the picture of the drain you can easily see leaves under the water with no sheen (oil) or dark oil there in the water.
Anyone that knows anything about oil in water will see that there is no oil in that drain at all and if there was some oil going there, it would float on top of the water and not go down the drain unless the level dropped as oil will not sink in the water when it is flowing normally like in the picture.
I agree Tony, I don't know if Jim is just lying like normally or if he is really just an idiot, who knows?
It is a shame that people out there are listening to him, falling for his B.S., falling for his lies and the worst part, he is still using scare tactics with the customers there, it would be nice if people and customers read these forums to see the truth and be able to see the lies being exposed here for the world to see.