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Biffy Fuel-up Log

2005 Toyota Avensis
Property of theoilburner. Added Dec 9 2010

Showing all fuel-ups and notes


Mar 9 2011

Computer claimed 35.8mpg.

  • 366.5
  • 13.306
  • £5.03
  • £66.94
  • 27.5

Added by theoilburner on Mar 9 2011 at 11:52 pm


Jan 31 2011

Computer claimed 35.1 mpg.

  • 374.6
  • 13.380
  • £4.92
  • £65.79
  • 28.0

Added by theoilburner on Feb 1 2011 at 4:40 am


Jan 10 2011

Computer claimed 38.9

  • 342.3
  • 11.357
  • £4.88
  • £55.41
  • 30.1

Added by theoilburner on Jan 11 2011 at 5:37 am


Dec 30 2010

Not bad considering the very cold weather and countless minutes spent idling to defrost the car. Computer said 36.9mpg.

  • 357.2
  • 11.869
  • £4.73
  • £56.12
  • 30.1

Added by theoilburner on Dec 31 2010 at 1:52 am


Dec 15 2010

Well out from the computer's 55.8mpg. Interestingly, this was a strict 55mph economy run, slipstreaming trucks. So the computer should have been roughly right, so what is going on here? Both fill ups today were with an air temperature of around 2 degrees C.

  • 78.7
  • 2.061
  • £4.65
  • £9.59
  • 38.2

Added by theoilburner on Dec 14 2010 at 11:42 pm


Massive difference between this and claimed consumption of 40.9mpg. Very strange these results at the minute. The claimed consumption should have been about right, as most of the miles were either motorway at 60mph or A-roads at 50-60mph, with hardly any town driving at all. Note: filled up with super unleaded here, hence price.

  • 131.0
  • 4.948
  • £5.03
  • £24.89
  • 26.5

Added by theoilburner on Dec 14 2010 at 11:40 pm


Dec 14 2010

I'm beginning to wonder if the inconsistent values from brim-to-brim figures (computer values appear OK, but are sometimes out) may be caused by the fuel shut-off device in the filler neck? Perhaps it is less sensitive during colder conditions, resulting in more fuel in and therefore, seemingly lower actual economy versus reported economy on computer. Maybe. Either that or there is some very iffy calibration on some local fuel pumps!

Added by theoilburner on Dec 15 2010 at 12:23 am


Dec 12 2010

Given the last two strange readings, the most sensible way to look at it is to get the average of these two tanks, which gives 44.5mpg for the trip up and back from Scotland. That seems to be a more likely figure and is consistent with previous data.

Added by theoilburner on Dec 14 2010 at 5:53 am


Return trip from Scotland. Computer claims 44.3mpg. Note how much better than the last fill up this is!! Last tank was filled in freezing conditions, this one in mild conditions, could that make such a big difference to fuel density, causing one low result and one high one?

  • 329.1
  • 7.666
  • £4.65
  • £35.66
  • 42.9

Added by theoilburner on Dec 12 2010 at 8:03 pm


Dec 11 2010

Long trip up to Scotland, plus day trip. This seems strange, fuel pump calibration may have been off. Computer recorded 41.5mpg, which should have been close, given the very long 70mph cruise for the entire 470 miles.

  • 470.7
  • 15.084
  • £4.61
  • £69.60
  • 31.2

Added by theoilburner on Dec 12 2010 at 7:38 pm


Dec 9 2010

Computer said 30mpg, so computer was atypically pessimistic. Very cold weather and lots of short journeys, so low figure is to be expected here.

  • 125.8
  • 4.943
  • £4.61
  • £22.81
  • 25.5

Added by theoilburner on Dec 10 2010 at 12:43 am


Dec 6 2010

Oil changed, used fully synth 5W30. Tyre pressures set at 35psi all round. Car running noticeably better now.

  • 44,300

Added by theoilburner on Dec 14 2010 at 5:37 am


Nov 29 2010

Computer claimed 36.9mpg.

  • 392.5
  • 13.560
  • £4.54
  • £61.55
  • 28.9

Added by theoilburner on Dec 9 2010 at 3:39 am


Nov 11 2010

Computer claimed 35.2mpg.

  • 330.5
  • 11.861
  • £4.54
  • £53.84
  • 27.9

Added by theoilburner on Dec 9 2010 at 3:39 am


Oct 26 2010

Computer claimed 39.4mpg.

  • 414.4
  • 13.755
  • £4.46
  • £61.39
  • 30.1

Added by theoilburner on Dec 9 2010 at 3:39 am


Sep 18 2010

Computer claimed 39.5mpg.

  • 419.8
  • 12.786
  • £4.24
  • £54.16
  • 32.8

Added by theoilburner on Dec 9 2010 at 3:38 am


Aug 28 2010

Long return trip from Scotland (plus day trip), computer claimed an optimistic 45.6mpg.

  • 498.5
  • 13.853
  • £4.39
  • £60.77
  • 36.0

Added by theoilburner on Dec 9 2010 at 3:38 am


Aug 27 2010

Long trip up to Scotland, very busy traffic due to bank holiday weekend.

  • 362.0
  • 9.906
  • £4.39
  • £43.46
  • 36.5

Added by theoilburner on Dec 14 2010 at 5:47 am


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