A standard implicature is a conversational implicature based on an addressee's assumption that the speaker is being cooperative by directly observing the conversational maxims.
In the following exchange, A assumes that B is being cooperative, truthful, adequately informative, relevant, and clear. Thus, A can infer that B thinks A can get fuel at the garage:
- A: I’ve just run out of petrol.
- B: Oh; there’s a garage just around the corner.