Like I had said, I am NOT sure if the residual dye can just be washed out or not. Also, I am not sure what the regulations and fines of the USA are. The people I know that had their tanks dipped, were at trade shows in Ontario, Canada. Only one of the people claimed to have their fuel filter spun off, and checked. They hadn't been running the dyed diesel, so they had nothing to worry about. But apparently, there were people there that got caught, and fines were steep.
I did not bring this up to start an arguement, but rather as a word of caution. If everyone is selling red-dyed diesel from thier pumps, then I guess there is nothing to worry about, and carry on business as usual. :roll: