Announcement

Collapse
No announcement yet.

Fuel Consumption 2015 2.0 CDTi ST

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Fuel Consumption 2015 2.0 CDTi ST

    Monitored the fuel consumption on a fairly long run.

    Laden car, two adults, one large dog, heavy items on the rear seats, large roof box with heavy contents.

    Three fueling on journey (could have done it on less)

    Overall 827.2 miles, actual 40.09 mpg at an average speed of 51.5 mph

    First fueling after initial fueling:

    This section included over an hour to travel 9 miles on the A14 due to road works and over an hours to travel from Junction 30 to the other side of the Dartford Crossing due to a broken down lorry blocking two lanes (as we approached the broken down lorry the traffic news on the radio was that the queue went back to junction 28 - anyone who knows the M25 will know that is some distance).

    1st REFUELING

    Litres used 42.08
    Gallons used 9.2563
    Miles travelled 359
    Car showing 42.9 mpg
    Calc showing 38.78 mpg
    Ave speed 44.3 mph

    ACCUMULATED

    Litres used 42.08
    Gallons used 9.2563
    Miles travelled 359
    Car showing 42.9 mpg
    Calc showing 38.78 mpg
    Ave speed 44.3 mph

    2nd REFUELING

    Litres used 26.83
    Gallons used 5.9018
    Miles travelled 244.4
    Car showing 44.9 mpg
    Calc showing 41.41 mpg
    Ave speed 60.8 mph

    ACCUMULATED

    Litres used 68.91
    Gallons used 15.1581
    Miles travelled 603.4
    Car showing 43.7 mpg
    Calc showing 39.81 mpg
    Ave speed 49.6 mph

    3rd REFUELING

    Litres used 24.9
    Gallons used 5.4772
    Miles travelled 223.7
    Car showing 45.3 mpg
    Calc showing 40.84 mpg
    Ave speed 58 mph

    ACCUMULATED

    Litres used 93.81
    Gallons used 20.6353
    Miles travelled 827.2
    Car showing 44.1 mpg
    Calc showing 40.09 mpg
    Ave speed 51.5 mph

  • #2
    The mpg is interesting, so the cars ecu over estimated it then.
    My 13plate 2L cdti auto averages 42mpg, mixed driving, part motorway, duals and up and down the valleys everyday.
    Last edited by MJSROOFING; 23-10-2017, 03:34 PM. Reason: Spelling

    Comment


    • #3
      Sorry, did not state, this is an auto.

      The journey was mainly motorway and the roof box 440 litres so quite large and whilst looking reasonably aerodynamic obviously generates drag..

      And yes, the ecu always seems to be optimistic - some cars enable a 'correction factor' to be input so that the onboard gives a truer reading.

      Must admit not overly ecstatic at the mpg when used locally.

      Comment


      • #4
        When we went to France, fully loaded etc I had it up to 58mpg which I thought was amazing for a 2L auto.
        Time I got back it was on 55.

        As soon as I hit the motorway it goes up, I was averaging 42 around town and did an hour on motorway and it went up to 48.

        Comment


        • #5
          Well, my 827 between fuelings was about 700 miles on motorways and the rest on A roads. And, it was down to SW France so the motorways were not congested.

          Wonder why I am getting so few mpgs?

          Comment


          • #6
            Originally posted by MJSROOFING View Post
            The mpg is interesting, so the cars ecu over estimated it then.
            My 13plate 2L cdti auto averages 42mpg, mixed driving, part motorway, duals and up and down the valleys everyday.
            5-10% over-stating of mpg is normal for most cars nowadays.
            .

            Comment


            • #7
              Originally posted by Paul View Post
              Wonder why I am getting so few mpgs?
              Depends on the speed you're travelling.

              My auto (2.8 petrol) is most economical at low-50s mph (the lowest non-lugging speed in the highest gear). Slower or faster speeds result in worse mpg. The parasitic losses from the auto box impact mpg on slow-speed or stationary driving while air resistance impacts mpg on high-speed driving.
              The same is true of most medium-large-engine old-type 'slushbox' autos. Newer types of autos such as DSG won't have such high transmission loss although they're not smooth to drive in slow-speed manoeuvring.

              Manuals, when driven in the same gear, tend to have better low-speed mpg than old-type autos due to not having to keep an auto box turning with its extra friction and pumping losses.
              .

              Comment

              Working...
              X