Petrol consumption. Oh my god

Discussion in 'General Discussion' started by the2ems, Nov 4, 2011.

  1. Doesn't make sense to drive these everyday, it's a camper! You wouldn't pack a rucsac full of camping gear just to go to the shops! I've found having a decent standard engine running as it should with twin webers gets me up most hills in fourth and gives me a relaxed drive. No need to get another engine (cept for the fun of it :) (would be a laugh to be able to pull a massive wheely from the lights thou :->
    cheers
    S
     
  2. dean_butler

    dean_butler TLB Design Guru

    They are thirsty little things. I have put £45 in over wknd and nearly all gone :eek:
     
  3. any tips for things to check when fuel consumption high?

    Don't know exactly how high but certainly no-where near 20mpg

    Its a recondition engine, just put in ands sounds good so believe my timing is good..

    fuel filter?
     
  4. fuel consumption has been debated on here and will be ad infinitum. I've read most of the posts on here before about fuel consumption and believe that the majority of methods being used to monitor, record and report fuel consumption as having quite fundamental flaws. I don't doubt the numbers people are quoting, I doubt the validity of the methods being used to record it.

    However, here is what VW have to say about it;

    Taken from VW's own literature in 1973.

    For the official consumption under DIN 70 020 'laboratory' conditions VW reported

    1.6 engine = 24.8 mpg
    1.8 engine = 21.9 mpg

    i've rounded those to nearest decimal place.

    They recorded this by;

    Test Route; A marked stretch of 10km road, surface level and dry with minimum gradients (max 1.5%). There should be no wind, (max air speed 3 m/s). Air temperature must be between 10 C and 30 C and atmospheric pressure must correspond with the norm for low land areas. The stretch of road must be traversed in both directions without stopping, at as nearly as possible 3/4 of max speed of the vehicle, but not exceeding 110 kmh.

    The DIN 70030 then requires that 10% be added to determine fuel consumption. In town traffic and during cold seasons fuel consumption should be expected several litres higher than those quoted. It may be possible to achieve the quoted figures if VW advice for 'Driving economically' is followed.

    Driving Economically

    The lowest fuel consumption is obtained when driving for very long distances, at medium speed without any stops and without braking. Following a reasonable speed over a long distance for long periods should mean that the reported fuel consumption figures may be obtainable.

    The preferred economical driving ranges for the Type 2 1.6 litre engine are (MPH)

    First gear = 0 - 9
    2nd gear = 9 - 18
    3rd gear = 15 - 31
    4th gear = 24 - 50

    Only when driving under these extreme conditions are the VW consumption figures classed as being 'maybe' achievable

    :)
     
    Day likes this.
  5. I appreciate i wont' get it exactly right, but all clculations i'm coming up with have my consumption sitting at about 15mpg which is obviously far too high.. therefore - any tips for what to check to try and improve this at least a bit ?

    Calcultion (very approx sum to get a feeler for where its sitting):
    130 - kms driven (only about 20 in city)
    24 - liters (approx half a tank ie. fuel reader sitting on half way)
    5.4 - km per liter
    24.6 - km per gallon
    = 15.4mpg

    I know its flawed from an accuracey perspective (in particular the half tank reading) but its been high consumption for a long time (ie before I got engine fixed) and being the start of the season, I'd like to check obvious things to try and improve it a little bit
     
  6. I'd suspect the fancy app. Are you filling up to exactly the same point in the tank each time?

    If not, the app's calculations will mean nothing.
     
  7. Why does anyone with half a brain need an App to calculate fuel consumption? A very basic calculator it you're no good at maths, or mental arithmetic if you fancy a bit of a brain workout.

    As stated by Snotty, unless you brim the tank each time you fill, ther's no point trying to make any sort of calculation.
     
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  12. Poptop2

    Poptop2 Administrator

    Using the driving techniques i learned about last week i did 162 miles on £35 worth of fuel in my van this weekend .

    i paid 136 a litre , £35 worth = 25.7 litres or 5.7 gallon, 162 miles divided by 5.7 gallon equals 28.4 ,true i never did much above 50 mph but it was hilly driving and i changed gear a lot .

    its mainly the heavy right foot that determines the mpg .
     
  13. £35 divided by 5.7 gallons works out at just over £6 per gallon. I can remember, back in the day, saying that petrol would never reach £1 per gallon. How scary is that :-
     
  14. rickyrooo1

    rickyrooo1 Hanging round like a bad smell

    unleaded 139.9 by me now and yet there is no protests by truckers anymore - beaten by the govt' again or what? budget wednesday too grrrrrrr
     
  15. foe

    foe

     
  16. this is why a good set of twin cars set up well will pay for them selves in no time
     
  17. Silver

    Silver Needs points/will pay!

     
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  19. with a well set up set of carbs a freer flowing exhaust and some larger rear wheels and tyres i managed to get 34 MPG on the way to Oktoberfest last year

    out of a otherwise stick 1600
     
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