It is not a fuel additive and is colourless ... All new-age vehicles powered by a diesel engine come with a separate AdBlue tank. This safe-to-use fluid, along with a Selective Catalytic Reduction ...

It is not a fuel additive and is not added to the fuel tank of a vehicle. AdBlue® is a colourless, non-toxic liquid that converts pollutants into gases which do not harm the environment.