A filter, for use in removing residual fuel vapors from within an engine's intake system, includes a filter element having a plurality of fibers, for placement in communication with an intake air flow passage. Each of the fibers includes a hydrocarbon-absorbing material. The hydrocarbon-absorbing material may be a solid material such as, e.g., carbon, or may be a liquid such as a relatively non-volatile polar solvent, or it may be part of the fiber polymer itself. Alternatively, the material may be a combined solid and liquid. In one embodiment, each of the elongated fibers includes a longitudinal open channel that holds the hydrocarbon-absorbing material. In another embodiment, each of the elongated fibers includes a central stem and a plurality of lobes extending outwardly from the central stem, with a longitudinally extending slot defined between adjacent lobes.