Abstract: An attachment for introducing fluid to the air intake of a carburetor of an internal combustion engine has at least one open-ended barrel in the form of a tube positioned in the air intake stream of a carburetor with the axis of the barrel in parallel alignment with the air flow. The attachment includes a fluid reservoir and tubing for the passage of fluid from the reservoir to an orifice leading into the bore of the barrel. The barrel may have a venturi configuration. Thus, the passage of carburetor intake air through the bore of the barrel creates a suction which draws fluid into the bore where it is atomized and vaporized.