The_Dark_Side said:the only way anyone can tell if your car is running white diesel is if they dip your tank.
removing the dye has no effect.
all it does is turn the stuff white, unfortunately when they dip your tank the OTHER additives in red diesel show up even though you've removed the dye.
As I said, in old times it use to be just the dye. Also red stains the pipes/tank, so even if you fill up with white, they can still tell they've used red.