Fuel Efficiency Climate control setting

Discussion in '8th Generation (2008-2015) [Acura TSX]' started by vygec, Saturday 16th Mar, 2013.

  1. vygec Club Member ★ ☆ ☆ ☆ ☆

    I always drive around with the 'AUTO' option set, and let this set the temp accordingly. However, i have just got a new job and my annual mileage as a result will go up from 4k to 20k per year :Aghast:.

    So with trying to be a bit more concious with fuel consumption, if i take the auto setting off, can i expect better figures with consumption? My theory being that the AC won't be used a result but just the normal fan circulation.
    Or is this a flawed understanding?
    Ideally i appreciate a diesel would be the preferred option, but considering i have only had the car a few months- i'd loose too much selling and buying a diesel equivalent.
     
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  2. DeviateDefiant Co-Founder Staff Team

    United Kingdom Leo Northants
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    I never use A/C, to me the UK weather never makes it necessary, there's a few summer fringe cases I guess but personally I'd just crank a window.

    The heat from your fans is drawn from the engine bay, a lot of people mistakenly believe that it ups fuel consumption; it actually just helps the engine cool down.

    Don't use A/C and simply don't worry about it, have it as hot/cold as you like and I honestly don't think you'll notice the slightest difference in your consumption.
     
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  3. TheDarkKnight Expert Advisor ★ ★ ★ ★ ★

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    Doesnt matter that you're doing 20k a year - if the majority of that is pottering around in stop-start traffic then a diesel would not make sense anyway. Mileage is important but its the usage of the car (ie daily motorway use) where diesel is advantageous.

    Regarding the climate control well, I don't think there'll be much fuel "saving" even if you disengaged the Auto option, so why bother. I bet properly inflated tyres would have a bigger fuel consumption impact in contrast to climate control.

    :Thumbup:
     
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  4. RobB Expert Advisor ★ ★ ★ ★ ★

    Climate control on bigger engines has very little effect on fuel consumption.
    Mines always on Auto, though I don't have a fuel guzzling petrol. (Sorry couldn't resist).:Whistle:
     
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  5. DeviateDefiant Co-Founder Staff Team

    United Kingdom Leo Northants
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    Some of us like our fuel-guzzling quiet and responsive petrols :Whistle:
     
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  6. vygec Club Member ★ ☆ ☆ ☆ ☆

    Thanks. I will be using Europe's biggest car park-M25. Officially a motorway!
     
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  7. RobB Expert Advisor ★ ★ ★ ★ ★

    Which part of it are you using?
    Timing is the key with M25.
     
  8. dennismate Club Member ★ ☆ ☆ ☆ ☆

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    I drive a petrol automatic and my view is - 'to hell with it I'd rather be comfortable than save a few pennies' - mines always set to auto, I do around 23K a year private and business use
     
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  9. vygec Club Member ★ ☆ ☆ ☆ ☆

    Hmm..interesting. ill be coming on where the m11 joins and going to hemel Hempstead. Any suggestions?
     
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  10. richsprint Account Closed. ★ ★ ★ ★ ☆

    There's also the argument that it keeps the aircon system lubricated and prevents the need for regular regassing.

    I think it probably would save a little fuel, but probably only a bit, and if you start opening windows, especially at speed that increases consumption due to drag.

    Remember if you don't use the auto setting, you need to press the AC button to show 'AC off' on the heater display. otherwise the ac compressor is still running.

    AC is useful in the UK, during our stormy summers is does get humid, AC helps to make journeys bearable some days. I find most people who don't use it, don't because its broken and they can't afford to repair it.
     
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  11. i-DSI Expert Advisor ★ ★ ★ ★ ★

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    Hy Vygec,
    I see a clear difference in fuel consumption with or without AC on both Civic petrol 1.4 I-DSI and Accord 2.0 i-VTEC.
    I only use AC when needed (defogging or warm/hot weather) and in any case I can see the fuel consumption rising. Let's say about 2 to 5%.
    As said, it's stupid and bad for your AC-system to never let it come on. Ideally you use it at least once/week for about 15 minutes minimum.
    Also: never save on safety. This means both feeling comfortable in your car and having clear windows.

    Mines always on Auto, though I don't have a fuel guzzling petrol. (Sorry couldn't resist).:Whistle:

    To Rob: I'm happy to not have a fuel guzzling petrol nether! I love that engine so much, ideal combination of performance and fuel consumption.
     
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  12. Ichiban Founder Staff Team

    England CJ Leeds
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    Remember on Auto the aircon compressor is not always engaged it only kicks in where necessary to maintain the ambient temperature.

    8th Generation has a far more advance aircon system it more efficient than the 7th Generation. I would say to achieve higher MPG.. Let us start by improving your driving methods first.
    Gentle acceleration and back off throttle when going down hill use engine braking, back off unnecessary braking, do your breaking if you have to in burst and sharp carry your speed in corners depending on the road limits and conditions. No more jack rabbits starts from red lights to beat off idiots driving German cars.

    Start use the real time MPG gauge on the MID use that as your guide and learn what it does depending on the throttle input and road gradient the more you keep on it you will refine your driving skill. The 8th Generation owners use the SIL- Shift indicator light to your advantage its there for a reason ..Its not for show :lol:

    Follow it with your real time display and learn your car can achieve some really good MPG . Diesel owners will soon achieve MPG of TDKs Accord.

    Its take some discipline but nothing that easy without some effort, In my opinion it the driver behind any car which is the key everyone blames the car for low MPG :Blink:
     
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  13. nargordon Junior Member ☆ ☆ ☆ ☆ ☆

    Very good advice and so true.
     
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  14. Ichiban Founder Staff Team

    England CJ Leeds
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    I have no patience to drive economically but I hardly use brakes so it helps in keeping momentum up. it only once in a blue moon when I drive in a super eco mode :Smile: life too short to worry about stupid MPG claims.
     
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  15. tomwillie Valued Contributor ★ ★ ★ ☆ ☆

    England Tom Royston
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    The handbooks of all the various Honda's I have owned advise using the AC for at least 10 minutes once a week to keep the seals lubricated. Also a good idea to have AC serviced every two years, as if AC packs up it could cost up to £1000 or so to put right through Honda dealer although cheaper through independent AC specialist. For all cars, Honest John in Telegraph advises leaving climate control on all the time as the compressor will only come on when needed.
     
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  16. i-DSI Expert Advisor ★ ★ ★ ★ ★

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    Hi Tomwillie,
    Above is only correct for cars with a full auto airco, not for 'all cars'.
     
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  17. TheDarkKnight Expert Advisor ★ ★ ★ ★ ★

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    I'd take anything that guy says with a massive pinch of salt. He aint no "oracle" or anything special. Not by a long shot.
     
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  18. jaytip Senior Member ★ ★ ☆ ☆ ☆

    I really don't understand your logic regarding this theory.If that were truly the case then all taxi drivers would buy petrol engined cars,but they don't.
     
    Last edited: Sunday 7th Apr, 2013
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  19. TheDarkKnight Expert Advisor ★ ★ ★ ★ ★

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    Nothing overtly complex in what I wrote. However I can't speak/account for the diesel-buying taxi drivers out there...sorry.
     
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