>>Alas, our recently bought Mitsubishi Chariot turbo 
>>achieves
>>a fuel economy of about 0.14 square mm * even when driven
>>gently.

> Fuel consumption, not "economy", no?  Maybe the reciprocal 
> for
> economy.. ~7 mm^-2

No.
:-)

That's what people call the measure here.
So, that's what it's called.

In fact, as it happens, it's even more "official" than I 
realised.

Here

        http://www.transport.govt.nz/assets/NewPDFs/Improving-Fuel-Economy-Paper.pdf

is an official discussion paper, with submissions closing on 
28 March this year, which ostensibly is about

    Improving the Fuel Economy of Vehicles Entering the New 
Zealand Fleet

            discussion document (PDF, 1,382kb)

but is *actually* about changing the standard of measure of 
fuel economy from litres per 100 kilometres (that's what 
they say) to "grams of CO2/km" as (they say)

    "this reflects the intention and objective of the 
proposal which is to reduce CO2 emissions"

So, if this paper is accepted, in future in NZ the fuel 
economy of a vehicle will be measured in grams of CO2 per 
kilometre

Lessee - that's energy per square area - hmmm, same as eg 
solar insolation aka brightness.

So, the new NZ measure of fuel economy will be expressed in 
how bright your vehicle is.

Hopefully brighter than the er <<<perjoratives deleted 
mainly in the interests of brevity >>> who wrote this paper.

Interestingly:

    Periodic reviews of the regulated standard would
    be carried out to ensure the petrol mix is not affecting
    the actual improvement rates /km' is located in Appendix 
4.

So, the absolute or actual "economy" is not what counts, 
it's how much better you are making it than you were before, 
if the playing field had not been improved.

        Russell


__________________________

They say

    Vehicle fuel economy ratings, as supplied by
    manufacturers, are often expressed in terms of
    'litres/100km'.

And

    These ratings can be converted to 'grams of CO2 /km'.
    Our carbon calculations for petrol

Do tell. How clever.



_______________________________

Vehicle fuel economy ratings, as supplied by manufacturers, 
are often expressed in terms of
'litres/100km'. These ratings can be converted to 'grams of 
CO2 /km'. Our carbon calculations for petrol
2
vehicles are based on the 2005 regular and premium petrol 
mix, and would need to be normalised to
that year, or another appropriate year, when enacted in 
legislation. Periodic reviews of the regulated
standard would be carried out to ensure the petrol mix is 
not affecting the actual improvement rates.
/km' is located in Appendix 4.
More information on the conversion of 'litres/100km to grams 
of CO
2




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