Quote:
Originally Posted by vnx205
In case anyone is still working in mpg instead of Litres/100km, there really are good reasons to change.
One important reason is that mpg makes it hard to work out the savings that have been achieved with improvements in fuel economy.
Who has saved the most money?
Driver A improves her fuel consumption from 40 mpg to 60 mpg. (50% better)
Driver B improves her fuel consumption from 20 mpg to 25 mpg. (25% better)
In fact driver B saves more money than driver A. For every 100km they travel, driver A saves 2.4 litres while driver B saves 2.8 litres over the same distance.
.
Litres/100 km really is the only sensible way to work out fuel consumption.
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40 mpg = 7.0634 l/100
60 mpg = 4.7089 l/100
7.0634- 4.7089 = 2.3545 or 50.001061819108496676506190405403%
20 mpg = 14.1268 l/100
25 mpg = 11.3014 l/100
14.1258 - 11.3013 = 2.8245 or 24.99269995487244830240768761116%
Sorry I could only calculate this to 31 decimal places
But whatever way you look at it the savings in % terms are, and always will be the same irrespective of whether you use metric or imperial - that is one of the beauties about %'s
Just my opinion - and I am quite surprised knowing your age - that you you do not think imperial
