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False readings at petrol pumps.

  • 13-10-2011 8:35pm
    #1
    Going Forward
    Banned (with Prison Access) Posts: 8,224 ✭✭✭


    Speaking to someone today who regularly brings an accurately pre-marked (at 10 litres) empty 5gallon drum to petrol stations and buys exactly 10 litres of juice.

    He rarely gets 10 litres.

    I've not tried it myself, but I do not doubt him, and I see very very few metrology service stickers on pumps anywhere.


Comments

  • #2
    GerardKeating
    Registered Users, Registered Users 2 Posts: 7,806 ✭✭✭GerardKeating


    Going Forward wrote: »
    Speaking to someone today who regularly brings an accurately pre-marked (at 10 litres) empty 5gallon drum to petrol stations and buys exactly 10 litres of juice.

    He rarely gets 10 litres.

    I've not tried it myself, but I do not doubt him, and I see very very few metrology service stickers on pumps anywhere.

    Does he bother to report them to Metrology ???


  • #3
    Going Forward
    Banned (with Prison Access) Posts: 8,224 ✭✭✭Going Forward


    GerardKeating wrote: »
    Does he bother to report them to Metrology ???

    Dont think so.


  • #4
    rubadub
    Registered Users, Registered Users 2 Posts: 32,386 ✭✭✭✭rubadub


    You say stationS, how many has he gone to. Have they checked that the tank is accurate? the more accurate ones would have the level moulded into them.

    Many measuerment vessels, like tanks, kitchen measuring jugs, beer fermenters etc, have got printed indications on them, these are often misaligned, e.g. his lines might be printed too high so it appears he is short.

    A simple test is with water, out of a cold water tap 10L should weigh 10kg, so if you just have a kitchen scale you can get a 2L bottle, fill it until it is 2kg and fill the butcket 5 times and check.

    I have heard it is common for 5 gallon beer fermenters to be innaccurate.


  • #5
    Jagle
    Closed Accounts Posts: 870 ✭✭✭Jagle


    also petrols density is dependent on its temperature


  • #6
    ted1
    Registered Users, Registered Users 2 Posts: 23,901 ✭✭✭✭ted1


    Let it settle before its measured


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  • #7
    Going Forward
    Banned (with Prison Access) Posts: 8,224 ✭✭✭Going Forward


    Points all valid, I can only presume that he measured and marked his own drum accurately.

    What really made me take notice was the fact that the traditionally more expensive stations returned a fuller or correct measurement.


  • #8
    maxer68
    Closed Accounts Posts: 1,076 ✭✭✭maxer68


    This comes up so often and its always someone else who says.

    If you are in doubt, call the NSAI.

    All pumps have seals on them and its an offence to tamper with them - min 10k fine if caught.
    Pumps are checked randomly with no pre-notice and most stations are checked at least once a year.

    But if ever in doubt check it out yourself and don't what someone heard in the pub/from a taxi driver/from a mate, becasue when you dig deeper, thier story came from someone else, whose story came from someone else etc etc.


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