To provide a fuel maintenance guide system that preliminarily notifies before executing transition to a fuel maintenance mode that prioritizes fuel consumption irrespective of an intention of a driver.SOLUTION: A fuel maintenance guide system includes: a display part 10 for displaying a view for encouraging consumption of fuel; and a control part 90 estimating a time B to automatically transition to a fuel maintenance mode to prevent deterioration in the fuel and operating the display part 10 for notification in a predetermined period C before reaching the time B based on a timing when the fuel is supplied to a vehicle 500.SELECTED DRAWING: Figure 1
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