Abstract: A fuel saving device is provided that is adapted to be connected between the outlet of a carburetor and the inlet of an engine manifold in which the carburetor's throttle is modified to emit a constant amount of fuel and air. The device comprises a hollow housing having a first end adapted to engage the outlet of the carburetor and a second end adapted to engage the inlet of the engine manifold, from six to twelve screens positioned in the housing and a throttle positioned in the housing between the screens and the second end. In a preferred embodiment, the screens are positioned at three different locations within the device. At each location, the pair of screens are superposed one on another. The distance between each location should be one inch or less. Each screen has about 244 perforations per square inch, and each perforation is square in shape.