To provide a program, a method, and a merchandise selection device for preventing refueling with a wrong type of oil.SOLUTION: A computer-implemented merchandise selection device includes: a registration unit configured to register an oil type classification of oil to be refueled in a recording unit located inside or outside the merchandise selection device; a merchandise information acquisition unit configured to acquire merchandise information including oil type classifications of merchandises sold at a refueling station; and a merchandise selection unit configured to select, as a merchandise to be refueled, a merchandise whose oil type classification included in the merchandise information matches an oil type classification registered in a storage unit.SELECTED DRAWING: Figure 1

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