Not fully depressing nozzle trigger when fuelling at petrol station

[Deleted User]

onomatopoeia99 wrote: »

Yup, and they will fine just as much for the pump giving too much fuel for the reading (so under charging the consumer) as for it giving too little.

Really? I'm sure products in shops with stated weight on label can be over but not under.

Jackmydad wrote: »

While I was still at school I had a part time job on the pumps.
It was 1970-71. Can't remember which were and which weren't now, but some cars were very tricky to fill at more than a dribble, requiring the nozzle to be at the "right" angle. Others you could just dump the fuel in.

Reminds me of a moped I had when I was 16/17, always had to spend what felt like 5 minutes trying to get the pump to dispense without clicking off. Some stations it was worse then others.

System

Joe_Horner wrote: »

But if you do that you need to make sure you have those clip-on magnetic fuel conditioners on your fuel lines. Otherwise it'll keep trying to flow north - south regardless of which way the car's pointing and takes more effort to pump from the tank when you're heading sideways.

You may be onto something there. If you clamp one around the petrol pump hose so all the molecules are in alignment does that mean you'll get more fuel in per measured litre? After all the molecules will be nice and neat instead of just a random jumble all colliding with each other.

david39

Adding to an earlier post regarding Trading Standard tests, when they check the quantities at the pump they don't just dispense 5 litres into a jug and say Pass or Fail.
They check several ranges of quantities into accurately calibrated measures and they also repeat this several times at different rates of flow through the nozzle.
The pump has to deliver the correct amount every time, otherwise they fail the pump. So there can be no difference to the amounts of fuel you receive irrespective of how quickly you put it in your tank

WobblyDog

Jackmydad wrote: »

Also always fill up at sea level as any bubbles will be smaller due to the greater air pressure. . .

No, you should try to fill up at the highest filling station that you normally pass, to maximise the amount of free gravitational potential energy in the fuel. I did the calculation for this once, and the saving is well under 1% of the purchase price, so it's not worth bothering actually.

Mr.Generous

I'm just waiting for someone to suggest diluting the fuel with 10% paraffin like they did during WW2

Laffinarab

If you clamp one around the petrol pump hose so all the molecules are in alignment does that mean you'll get more fuel in per measured litre? After all the molecules will be nice and neat instead of just a random jumble all colliding with each other.

Oh my god, please stop talking. The world that listens gets a bit less intelligent every time you open your mouth.... actually

Joe_Horner

Tarambor wrote: »

You may be onto something there. If you clamp one around the petrol pump hose so all the molecules are in alignment does that mean you'll get more fuel in per measured litre? After all the molecules will be nice and neat instead of just a random jumble all colliding with each other.

In theory yes, but the fuel companies caught on to that quite a while back. That's why they have the bend in the nozzle to jumble them all up again.

Also, you have to do it before the measuring is done, which worked fine with the old style pumps where the delivery pipe ran up the outside to a sight glass but no good on modern enclosed pumps

Joe_Horner

Deleted_User wrote: »

Really? I'm sure products in shops with stated weight on label can be over but not under.

Kind of sort of.

Trading standards are more interested in the accuracy of the measuring equipment than the stated weight (provided it's not over-stated).

So, if a nominal "1kg" pack of apples actually weights 1.05kg because apples don't come in exact weights that's not a problems as long as the scales used to weigh them correctly said they weighed 1.05kg.

If you bought a pre-sealed 5l can of paraffin that had been filled to an accurately measured 5l, then they'd added a little more for some reason, that would be fine. But, with pump fuel, it's being measured as it's dispensed. So the amount delivered is a direct measure of the accuracy of the meter.

facade

Mr.Generous wrote: »

I'm just waiting for someone to suggest diluting the fuel with 10% paraffin like they did during WW2

No need, the Government are going to dilute it with 10% ethanol to save you the bother.



Charge the same for it mind......

Car_54

facade wrote: »

No need, the Government are going to dilute it with 10% ethanol to save you the bother.



Charge the same for it mind......

That would be a bargain: the excise duty on ethanol is £28.74 a litre.