It could be fuel, if you consider fuel to be one of the resources a star can provide you. If your fuel is something that is inside the star (or star's orbit),

It could be fuel, if you consider fuel to be one of the resources a star can provide you. If your fuel is something that is inside the star (or star's orbit), and you have a means of extracting it, then you can use the star as a refueling point. You're right that using the star wouldn't require less fuel overall, but it could provide you access to extra fuel along the way.