Quote:
Originally Posted by JDNSW
Whether the better way of expressing it is litre/km or km/litre depends on whether you are trying to work out how much fuel you need to get from A to B or trying to work out whether you can get from A to B on one tank.
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That's right. I would have thought that the former situation is more common in the real world.
Quote:
Originally Posted by JDNSW
the only advantage of either method is that most people can multiply in their head easier than they can divide.
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Exactly! Working out L/100k is a simple multiplication. eg if you have a 15,000 km trip planned and you use 11 L/100km just multiply the two figures and knock a couple of 0s if the end. You have to budget for 1650 litres.
Quote:
Originally Posted by JDNSW
As I said above - there is no real advantage to either, it is simply that some people are more familiar with what they grew up with. For example, I grew up with the idea that a reasonable fuel consumption figure is 30mpg (9.42l/100km), this being the sort of figure you got from a Holden (48/215) or my father's Swift, and consequently I use it as a yardstick to this day, so I have to convert either way to compare.
John
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That is actually one of the reasons I found it so easy to start thinking in litres/100km. Perhaps our family was bigger and we had more kids loaded into Dad's FJ Holden, but we generally got about 28mpg. I had always seen that as some sort of benchmark. Since that was about 10 L/100k, it seemed to offer such an easy way of calculating fuel consumption. I didn't even really have to do any multiplication, since multiplying by 10 just involves adding a 0. Perhaps if my parents had owned a thirsty Yank tank that used something like 18mpg and I had become accustomed to that figure, I would not have found the transistion so easy. I suspect that part of the reason I changed was because when I used L/100km, there was really no maths involved. In fact because of the need to divide by 100. All I had to do was remove a 0. So 670 km would need 67 litres. What could be easier?