Not fully depressing nozzle trigger when fuelling at petrol station

agm2992mga

Hi all,

Is it true or just a myth that I've come across that not depressing the trigger fully when you are refuelling your vehicle at the petrol station is somehow more economical?
Something to do with the pressure application/filtration, meaning more actual fuel and less air are pumped in, I gather.
Or are the computers behind the petrol station clever enough to only charge you for the liquid fuel itself dispensed regardless of at what rate / speed?

Negligible difference perhaps and therefore better to get in and out as quickly as possible for - after all - time is money! :rotfl:

Thanks in advance for your informed responses.

Cheers!

missile

An urban myth.

System

Yep, utter rubbish. When Trading Standards come and do their random testing they just pull the trigger and measure the fluid dispensed and make sure what is on the display matches what is in their measuring jugs.

onomatopoeia99

Tarambor wrote: »

Yep, utter rubbish. When Trading Standards come and do their random testing they just pull the trigger and measure the fluid dispensed and make sure what is on the display matches what is in their measuring jugs.

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.

EdGasketTheSecond

I've heard if you fill in a north/south direction the fuel is more dense due to the earth's magnetic field and thus you get more fuel for your money.

EssexExile

I used to own a Mitsubishi Galant that would only allow you to fill very slowly, usually only if you held the gun at some strange angle. I didn't notice getting any more fuel that I should, I just noticed spending an awful lot of time at petrol stations.

oldagetraveller

Add fuel when the temperature is low and you should be able to squeeze in extra volume.
That combined with the magnetic field effect and you are quids in.:p

facade

I definitely gets more fuel into mine, if I hold the trigger fully back fuel sprays out of the filler.


I know it shouldn't, but like EssexExile's car, it will only take fuel at all with the nozzle half out and at an odd angle.

DaftyDuck

I regularly fill five litre petrol cans (which I then mix directly to two-stroke), and have a mark on the can to show exactly five litres so onward mixing with 2stroke oil is accurate. Obviously have to slow fill them.... and they always exactly match the pump reading at 5litres, to the drip!

I also do five litres of foamy diesel, even more slowly. Same same...

Mind you, standing on one leg and singing LOUDLY makes it cheaper... if only cos they close the kiosk window and hide!

Jackmydad

EdGasketTheSecond wrote: »

I've heard if you fill in a north/south direction the fuel is more dense due to the earth's magnetic field and thus you get more fuel for your money.

oldagetraveller wrote: »

Add fuel when the temperature is low and you should be able to squeeze in extra volume.
That combined with the magnetic field effect and you are quids in.:p

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

Joe_Horner

EdGasketTheSecond wrote: »

I've heard if you fill in a north/south direction the fuel is more dense due to the earth's magnetic field and thus you get more fuel for your money.

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.