Vehicle

1. A vehicle, comprising:

a fuel tank;

an engine to which fuel is supplied from the fuel tank; and

a control device;

wherein the control device:

calculates an amount of fuel to be supplied based on a first estimated fuel consumption amount necessary to drive for a predetermined number of days until degradation of the fuel starts after refueling; and

notifies a refueling instruction that the calculated amount of fuel should be supplied.

2. The vehicle according to claim 1 , further comprising:

a motor which functions at least as a drive source; and

a battery which is rechargeable from outside;

wherein the control device switches between an EV driving mode in which the vehicle drives using only the motor and an HEV driving mode in which the vehicle drives using the motor and the engine based on a charge capacity of the battery.

3. The vehicle according to claim 2 , wherein the control device calculates the first estimated fuel consumption amount based on an average fuel consumption amount per day involved in driving in the HEV driving mode for a period up to the present after the last refueling and the predetermined number of days until the degradation of the fuel starts after refueling.

4. The vehicle according to claim 3 , wherein the control device calculates the average fuel consumption amount per day based on driving histories excluding a driving history exceeding a predetermined driving distance per trip when calculating the average fuel consumption amount per day involved in driving in the HEV driving mode.

5. The vehicle according to claim 1 , further comprising an input means for inputting a planned driving distance, wherein the control device:

calculates the amount of fuel to be supplied by subtracting the remaining amount of fuel stored in the fuel tank from the sum of a second estimated fuel consumption amount calculated based on the planned driving distance input by the input means and the first estimated fuel consumption amount, and

notifies a refueling instruction that the calculated amount of fuel should be supplied.

6. The vehicle according to claim 5 , wherein the control device prompts a passenger to input the planned driving distance before notifying the refueling instruction.

7. The vehicle according to claim 5 , further comprising a navigation controller capable of setting a destination, wherein:

the control device sets a driving distance to the destination calculated by the navigation controller as the planned driving distance.

8. The vehicle according to claim 7 , wherein the control device notifies the refueling instruction when the vehicle is determined to be at a fueling station based on GPS information obtained by the navigation controller.

9. The vehicle according to claim 5 , further comprising:

a motor which functions at least as a drive source; and

a battery which is rechargeable from outside;

wherein the control device:

switches between an EV driving mode in which the vehicle drives using only the motor and an HEV driving mode in which the vehicle drives using the motor and the engine based on a charge capacity of the battery;

estimates a distance to empty in the EV driving mode based on a degree of degradation of the battery calculated from the driving history of the vehicle;

calculates a driving distance in the HEV driving mode by subtracting the estimated distance to empty in the EV driving mode from the planned driving distance; and

calculates the second estimated fuel consumption amount based on the calculated driving distance in the HEV driving mode.

10. The vehicle according to claim 1 , wherein the control device notifies a refueling instruction to the effect of going to a fueling station if the predetermined number of days until the degradation of the fuel starts after the last refueling have elapsed.

11. The vehicle according to claim 1 , wherein the control device notifies a refueling instruction to the effect of full tank refueling if the predetermined number of days until the degradation of the fuel starts after the last refueling have elapsed.