2 seasons (7 months) car idling fuel consumption - 15 min/wk

* Average Fuel Consumption at Idle:
half gallon per hour
2 Liters per Hour
1 Liter per 30 minutes


Car info:
4 cylinder
2 liter engine
automatic transmission
20 miles per gallon fuel economy
32 km per gallon fuel economy
7 km per liter fuel economy


Average speed:
80 km/hr highway speed
50 km/hr city speed
65 km/hr average speed


Full Tank fuel consumption analysis:
50 Liter (13 Gallons) fuel tank capacity (full tank)
500 km driving range at full tank fuel
7 hours drive at 65 km/h to empty a full tank fuel
7 km per liter fuel consumption


Average Fuel Consumption per Hour of Driving:
50 km per hour
-------------------- = 7 Liters per Hour
7 km per Liter


Fuel Cost per Hour:
7 Liters per hour x $1.30 per Liter = $10 per hour


Total Driving Time per Full Tank Fuel:
7 hours drive to empty a full tank fuel = 420 minutes


How long until my fuel tank goes empty at 7 months idle:
not driving my car for 7 months (winter and spring season)
30 weeks in 2 seasons (7 months)

420 minutes
----------------- = 15 minutes idle per week
30 weeks


Fuel Consumption at 15 minutes driving:
7 liters per hour
---------------------------------- = 1.75 liters per 15 minutes
4 fifteen minutes per hour


Conservative Fuel Consumption at 7 months idle (15 minutes per week -> 1 hour per month):
1.75 liters x 4 per month x 7 months = 50 Liters (full tank)


* Average "Actual" Fuel Consumption at 7 months idle (15 minutes per week -> 1 hour per month):
Using the data:
1 Liter fuel per 30 minutes idle
0.5 Liter fuel per 15 minutes idle

0.5 liter x 4 per month x 7 months = 15 liters (1/3 fuel tank)