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Mpg and running in?

Discussion in 'New A3/S3 (8V Chassis)' started by Ryanytchan, Jan 31, 2014.

  1. Ryanytchan

    Ryanytchan Member

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    Hi all,

    I have a 1.8 quattro and I'm now 300 miles in and averaging 29mpg, does this sound about right? How many miles does it require to achieve 'normal' mpg figures?
     
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  3. mjcourtney

    mjcourtney Well-Known Member

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    About 10,000....
     
  4. andywil13

    andywil13 Active Member

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    I'm still getting poor mpg after 5000 :-(
     
  5. PembsA3

    PembsA3 Active Member

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    29?!.. Yikes! That's worse than my old Golf V6 4motion! (32mpg) Really glad I ordered TDI 184 quattro now. Don't do the miles to really justify diesel but at least it should be cheaper to run than the Golf...
     
  6. JohnM100

    JohnM100 #teamSepang
    VCDS Map User Gold Supporter

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    So much of this depends on driving style and roads. Also are you trusting DIS or calculating from brim to brim at the pump? My DIS gives a figure ~3% better than actuals.

    Mine is on 3500 miles. I get 33 on my commute and 40 on a good run. No real change since the very early miles.

    Still early days in the life of the engine but comparing like with like, am now on average a whole 1mpg better on same roads and journeys than my 11 year old A3 1.8 T-Sport with over 100k on it. (But I wasn't expecting much difference when choosing the engine).

    Try googling "Real MPG" or "True MPG" as HonestJohn and WhatCar both have these.

    John.
     
    #5 JohnM100, Jan 31, 2014
    Last edited: Jan 31, 2014
  7. cuke2u

    cuke2u Well-Known Member

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    Yes I'd not put any weight to this until we know how the car is being driven and under what conditions. If any car was being driven rapidly in short stop start conditions then even the mpg of a diesel would be poor...
     
  8. m0sbf

    m0sbf Member

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    I have had a few new cars and they have all had poor initial fuel consumption. It took 10000 miles for my diesel Civic 2.2 to really give its best performance and economy. One thing I noticed was the oil colour. When the engine is very tight the oil was like it was from the tin, even after 5000 miles, still straw coloured. When the engine beds in and loosens up the oil starts going black, the car's performance then noticeably improves too. Less extra throttle is then needed up inclines and fuel economy is 10% better or more.

    After the initial running in period it is good to make the engine work a bit occasionally and rev it through the gears. Accelerating up hills is a good way of loading the engine and it seemed to run my engine in better. My Civic was run in carefully and had excellent economy after 10K.

    My current A3 2.0tdi 150 has done nearly 8K and seems to be reasonably run in now. Fuel economy is nearing 60mpg on a sensible speed run.
     
  9. cemerson

    cemerson Well-Known Member

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    The black colour comes from tiny bits of ground down pistons / cylinders / camshaft parts etc - makes sense that when the engine loosens up a bit, your performance and economy improves - less friction than before.
     
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  10. m0sbf

    m0sbf Member

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    Thanks, interesting. So there is a bit of merit in my theory that a car with golden coloured oil is still to run in.
     
  11. the_lecht_rocks

    the_lecht_rocks Well-Known Member

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    don't be daft - if the engine wears like that you're in the sh1t.

    the black colour is consequent to oil oxidisation and carbon deposits from the combustion cycle. it's certainly NOT engine parts LOL !
     
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  12. cemerson

    cemerson Well-Known Member

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    Nevertheless, the engine parts do wear slightly and con provide a bit of resistance to movement when new, and they do wear down a bit over time
     
  13. cuke2u

    cuke2u Well-Known Member

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    I'd rather think that the improvement in mpg is more down to the driver getting used to the engine and the sensitivity of the controls...
     
  14. cemerson

    cemerson Well-Known Member

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    There will be a bit of that, but that happens very quickly. The engines do 'bed in' and loosen up somewhat still.
     
  15. StefRobinson

    StefRobinson Active Member

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    My 1.6 TDI S-Tronic has done 1600 miles now and the economy hasn't changed since new. It's not as economical as I thought it would be. It's matching the economy of my old 2.0 TDI 8P at the moment.

    How much difference does winter make to the MPG? Cold mornings and a cold engine might count for a few MPG? Hopefully it will be better when it's done a few more miles and when it's warmer?
     
  16. 45bvtc

    45bvtc Well-Known Member
    Supporter Gold Supporter Team Cornflower Blue

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    OUR RS3 is 25/26mpg from NEW. OUR TT 2.0 quattro roadster is 25/26mpg from NEW.

    Guess the way the driver and/or drivers drive might have something to do with it... :racer:
     
  17. cuke2u

    cuke2u Well-Known Member

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    Cold weather does affect the economy a lot. Diesels take longer to warm up, the CC is working harder to warm up the cabin, you will be using the rear screen heater. It all adds up...
     
  18. Buneet

    Buneet Active Member

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    My 1.4 S-Tronic hit 5,500 miles the other day and I still achieve around 40.0 mpg (on a good day) I try to drive as smoothly as possible and try to allow 5 minutes in the morning for the car to warm up. I've once hit 50.2 mpg avg and that was a goooood day ;) I even took a picture of it I was that proud haha.
     
  19. Fanboy

    Fanboy An Audi Fanboy

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    So does heater affects the mpg (petrol cars)?

    Also is it better it let the car warm up? I usually leave it for 1-2 min... Is that enough it should it leave it a bit longer...
     
  20. Flugel Hound

    Flugel Hound Member

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    My 1.6tdi longterm average MPG(2) is 49 at the moment. I has certainly inproved from new. Ive now done 2500mile
     
  21. cuke2u

    cuke2u Well-Known Member

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    No it is bad practice to let the car warm up before driving off....
     
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  23. Fanboy

    Fanboy An Audi Fanboy

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    Why... It makes sense to let the car wake up and then driving it... I always thought it's better
     
  24. cuke2u

    cuke2u Well-Known Member

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  25. Fanboy

    Fanboy An Audi Fanboy

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