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> I30 Fuel Economy, A chance to brag
tjaliwalpa
post May 5 2008, 06:27 AM
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John,

On another post I mentioned I had calculated this as the relationship between l/100k and mpg way back when metric measures were introduced into Australia. Everyone was saying, "Ya, but what is that in the real world?" when you mentioned l/100k, so I worked out the ratio and that just happens to be it. I had a Falcon XY back then.

I recently checked the ratio again before posting it on here. No need to concern yourself with how it is worked out. All anyone needs to know is that it works.

Just divide 282.45 by the l/100k and the result is mpg. Works the other way to: divide 282.45 by mp and the result is l/100k.

Simple converter really, especially since most mobile phones have a calculator in them these days.

Bob
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eye30
post May 5 2008, 09:42 AM
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Thanks lakes for the conversion.

In the UK we buy diesel/unleaded petrol in litres but calculate usage in miles per gallon.

I use 4.546l = 1 imperial gallon. Not USA gallon which is different measurement.

For this trip I filled to the top of the fuel filler. The guage is now above half but not quite half way to 3/4 so estimated used 25 litre, assuming 55 litre tank and the length of the filler hose = 5.5 imperial gallons.

350/5.5 =63.5 mpg

Your way seem the most accurate as it seems to tally with the hyundai UK web site - 4.1l/100k (68.9mpg) for extra urban.

I see chb got 5.5l/100k

Can anyone else beat it?

Why can't we all use the same method bring on the French Revolution!!
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Shambles
post May 5 2008, 12:03 PM
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QUOTE(eye30 @ May 5 2008, 03:42 PM)
...Why can't we all use the same method bring on the French Revolution!!
[right][snapback]158855[/snapback][/right]


Qui, I agree!

PS.. what is the French for soixante neuf ?
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eye30
post May 5 2008, 01:08 PM
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Shambles

Should this be the RED "Devils" revolution!!!!!!!!!!!!

From a true blue.
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Lakes
post May 5 2008, 02:08 PM
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QUOTE(tjaliwalpa @ May 5 2008, 06:27 AM)
John,

On another post I mentioned I had calculated this as the relationship between l/100k and mpg way back when metric measures were introduced into Australia.  Everyone was saying, "Ya, but what is that in the real world?" when you mentioned l/100k, so I worked out the ratio and that just happens to be it.  I had a Falcon XY back then.

I recently checked the ratio again before posting it on here.  No need to concern yourself with how it is worked out.  All anyone needs to know is that it works.

Just divide 282.45 by the l/100k and the result is mpg.  Works the other way to:  divide 282.45 by mp and the result is l/100k.

Simple converter really, especially since most mobile phones have a calculator in them these days.

Bob
[right][snapback]158805[/snapback][/right]


Thanks Bob that is very helpful, my friend works out things like that, he has to work out spring rate of valve springs, he has a valve spring test machine but, worked out a formula to simplify it so he could use a calculator to work out sprng rate all he has to do is measure thickness of spring wire and distance between coils and can work it all out with a calculator. we have double checked it against the teast machine and it works perfect.
i had a XYGT 351, this new ute i have would run rings around it, but they were a great car in there day but thirsty, had a 36 gal fuel tank could go to queensland on one tank but so can my ute on less than half that if i drive carefully
THanks again always good to learn something useful
.
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Seoul-mate
post May 6 2008, 07:02 AM
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Hi Lakes,

Hi30's "282" figure comes from doing the following calculation.

100 x 4.5461 / 1.609344 = 282.48



Briefly this is because:

1 gallon = 4.5461 Litres
1 mile = 1.609344 km
and fuel consumption is based on travelling 100 km
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tjaliwalpa
post May 6 2008, 07:18 AM
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Seoul-mate,

Your figure of 282.48 is precisely correct. When I did my calculation, in order to get 282.45, I did some rounding before working out the figure.

Bob
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eye30
post May 6 2008, 11:08 AM
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Update of MPG.

When I said I had used 25l = 5.5 gallons that was based on my estimate by the fuel gauge.

On way to work filled up to the brim and I only got in 23.01 litres in the tank = 5.07 uk gallons.

Therefore new calculation is 350/5.07 = 69.04 mpg, which if my calculation is correct = 4.09l/100k

Is that right?

Why can't we all use UK imperial measurements it would make life easier???????????
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Shambles
post May 6 2008, 12:08 PM
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I agree, and lets get rid of this dollar thing too.

VOTE FOR THE £
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buddyforu
post May 9 2008, 04:12 AM
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FINALLY did my trip to Mackay (800km round trip). she dropped down to a respectable average of 8.3L/100km (this was with A/C on the whole way, plus a stiff SEly on the way down, and some city driving around Mackay). Pretty impressed with that! :beer:
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ozsnowman
post May 9 2008, 05:40 AM
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At the moment my trip meter is at 610km and the needle is still to the right of 1/4 full :)
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