Hey there! Sign in to join this conversationNew here? Join for free

getting 62 mpg from £13 fuel, but use a further 9 litres and drops to 50 mpg ? Watch

    • Thread Starter
    Offline

    1
    ReputationRep:
    Did a 180 mile journey today, began with a full tank of fuel, after journey it cost £13 to fill up to brim again, so 13 litres which equates to 62 mpg approx.

    However, it would have taken approx. 70 miles more until I was at half fuel point. it takes 22 litres to fill from half to brim. so if calculated, 250 miles at 22 litres of fuel, it would be approx 51 mpg.
    so how by driving just 70 more miles using 9 litres more fuel causes my mpg to go from 62 mpg to 51 mpg ?

    ty
    Offline

    17
    ReputationRep:
    It depends on your driving style

    A nice flat road driven at the optimum speed will provide the best mpg

    Driving like a nutter on a cold engine uphill on twisty roads and loads of start stops, gear changes will drop mpg like a stone
    • Study Helper
    Online

    21
    ReputationRep:
    Study Helper
    (Original post by I love life)
    Did a 180 mile journey today, began with a full tank of fuel, after journey it cost £13 to fill up to brim again, so 13 litres which equates to 62 mpg approx.

    However, it would have taken approx. 70 miles more until I was at half fuel point. it takes 22 litres to fill from half to brim. so if calculated, 250 miles at 22 litres of fuel, it would be approx 51 mpg.
    so how by driving just 70 more miles using 9 litres more fuel causes my mpg to go from 62 mpg to 51 mpg ?

    ty
    I fully answered this same question asked by you some time ago (post #14 in this thread):

    www.thestudentroom.co.uk/showthread.php?p=60493295&highli ght=

    Fuel gauges are notoriously inaccurate. Half way mark on the gauge cannot be relied on to indicate the tank is accurately half-full.

    Driving in an urban area will not produce the same mpg as driving at a constant speed on a motorway.

    Why are you having so much trouble understanding this?
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by uberteknik)
    I fully answered this same question asked by you some time ago (post #14 in this thread):

    www.thestudentroom.co.uk/showthread.php?p=60493295&highli ght=

    Fuel gauges are notoriously inaccurate. Half way mark on the gauge cannot be relied on to indicate the tank is accurately half-full.

    Driving in an urban area will not produce the same mpg as driving at a constant speed on a motorway.

    Why are you having so much trouble understanding this?

    ok, when the gauge is reading half full are you saying there is much more than half left in the tank ?
    How is one supposed ot measure mpg if the gauge is not accurate
    • Study Helper
    Online

    21
    ReputationRep:
    Study Helper
    (Original post by I love life)
    ok, when the gauge is reading half full are you saying there is much more than half left in the tank ?
    How is one supposed ot measure mpg if the gauge is not accurate
    There may be more than exactly half a tank or there may be less than exactly half a tank.

    I told you in the previous thread back in November last year how to measure your fuel consumption accurately and you followed those instructions to arrive at 62 m.p,g. on a 180 mile journey.

    The gauge is only there to tell you approximately how much fuel you have so you can estimate when to fill up so that you do not run out of fuel.

    The gauge is not there to tell you how many m.p.g. you can achieve with any degree of accuracy.
 
 
 
Reply
Submit reply
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Updated: February 20, 2016
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Would you rather give up salt or pepper?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Write a reply...
    Reply
    Hide
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.