Re: how to accurately measure mpg?

A much easier way....


At the petrol station, before putting petrol in:

note the cars milage
fill the tank
note how many litres of petrol used (gallons? whatever your measurement unit is...)


Next time you go to the petrol station, do the same thing...

You can now calculate how much petrol you used to cover a certain distance.

ie
stop 1 : 1563 miles, 10 litres of petrol into tank
stop 2 : 1682 miles, 15.2 litres of petrol into tank


So you just used 15.2 litres to cover  1682-1563 = 119 miles

Then convert to liters/100 miles (or miles per liter or gallon whatever) mathematicaly.

ie from above you get 12.7litres/100 miles or 7.8 miles on 1 litre.


No need to fuss about with full & empty tanks...

Mel


beerismygas@xxxxxxxxx a écrit : 
hi there,

i am trying to work out my cars mpg using the common method of filling
the tank to the brim, driving till nearing empty and then refilling to
calculate gas consumed using the trip counter mile reading.

the major problem is how to 'fill' the tank to a consistent level.

any ideas?




.

Relevant Pages