Hi folks
I think there's something wrong going with the reasoning here.
> On Fri, 7 Feb 2003 julian_davies@xxxxxxxxxxxxxx wrote:
>
> > This is the *ONLY* accurate way to measure average fuel consumption. Trip
> > computers don't. They have no reference to absolutes (total fuel volume
> > springing instantly to mind) only rate of flow and time.
>
> > Of course, the whole subject is relative. You may well BUY your fuel in
> > liquid measures, but your engine consumes it by weight
MD said >
> They've caught on to that here. All pumps have a little clause on them that
> states "volume corrected to 15C". Which basically means you only get a litre
> of
> gas when it's 15C outside. If it's -15C as it is today, you're getting much
> less.
> -mark
As far as I know, fuel pumps at gas stations measure what they pump in
volume. Petrol shrinks and swells quite a lot with changes in temperature.
So if the petrol in the underground tank is COLD, you get more molecules of
petrol per gallon. THere was/is a petrol station in Taupo (central, North
Island NZ) where due to the underground volcanic activity, the petrol always
came out HOT. Guess what; they were on a winner. They paid for cold petrol
pumped in, it heated up and they sold the same fuel expanded with no price
compensation for the reduced calorific value per litre.
If your motor has fuel injection, it also probably measures it in volume; cold
fuel - more calorific value per stroke, hot weather, less. Don't know how
carburettors would be affected. Probably the same.
So;> If it's -15C as it is today, you're getting much
> less. you are getting more actual fuel; if you want to see that as volume,
let it warm back up to +15 after it gets into your fuel tank.
Brian
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