your Miles per Gallon or Kilometers per Litre is easy with these
* First you'll need
a notepad and pen handy in your glove box for the next couple of
* Drive to your favorite gas station and fill your
car's gas tank up to the top.
* Before leaving the pump you will
need to get out your notepad and record the date.
* Now reset
your trip odometer to zero.
* Drive as you normally would and
when you're near empty return to the same gas station and fill up
the gas tank.
* This time you will record the trip odometer
reading, the date and how many gallons / liters your car's
tank took before it was full.
At this point you have enough information
to get a good idea of your car's gas mileage. The more times you
complete the above, the more fine tuned your numbers will be for
your car's gas mileage.
Now the simple calculation:
Kilometers per Liter:
Take the miles travelled from your trip meter
reading that you recorded and divide it by the gallons it took to
refill your tank. For example 100 miles on the trip meter
divided by 10 gallons recorded from the gas pump = 10
Gallon 100 / 10 = 10
If you are calculating metric kilometers per litre use this
Divide the trip odometer reading in kilometers by
the liters used to get the mileage. 1000 kilometers recorded divided
by 100 liters pumped in the gas tank = 10 kilometers to the litre.
you have it; you now know how efficiently your car is using the gas
that you're pumping into it.