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winter versus summer fuel consumption

Discussion in 'Land Rover Freelander' started by Jimbob1, Nov 16, 2019.

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  1. Jimbob1

    Jimbob1 Member

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    2005 td4 130k miles.

    I keep a log of fuel fill ups and mileage and Ive got a clear difference between summer and winter mpg rates of about 15%.

    Mine does about 420 on a full tank in summer but less once winter sets in. I generally use the same brand of fuel and havent done anything to change anything rhst should affect fuel efficiency. This has been the case over the last 3-4 years.

    Is this common?

    I was wondering if the air temp sensor might have something to do with it.

    Any ideas?
     
  2. PRO

    PRO Active Member

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    Common, many reasons.
    Tyres are getting harder towards plastic unless winter tyres.
    Takes longer for engine to reach optimal temperature.
    Cold air has higher density
    In sure there's more
     
  3. Nodge68

    Nodge68 Well-Known Member

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    Yes, perfectly normal.

    My own TD4 automatic will loose 2 or 3 Mpg over the colder months, when compared to summer time driving.

    There's lots of reasons for this, but it's mostly down to increased loading on the engine electrical system, (lights on more, heated rear screen use, heated seats, etc) which causes the alternator to make more power, and so the engine has to consume more fuel to keep up with the demand.

    There is also additional drag from thickening oils over the colder months, and tyre pressures will drop too, unless you're on the ball at keeping them correct.

    It's all perfectly normal stuff though.
     
  4. Arctic2

    Arctic2 Well-Known Member

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    FBH will kick in also if one is fitted
     
  5. windy81

    windy81 Well-Known Member

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    FBH ?

    I truthfully would think that you'd get better mpg due to the colder denser air, but i guess when you look at the bigger picture it makes sense for it to be less as mentioned above.
     
  6. PRO

    PRO Active Member

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    Get better powah from colder denser air, not mpg hehe.

    fbh = fuel burning heater or fairly big hammer, one of those two.
     
  7. Arctic2

    Arctic2 Well-Known Member

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    yes FBH = fuel burning heater, which uses some fuel in the winter months,
     
  8. 110tim

    110tim Member

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    My FL1 TD4 fuel consumption depends on the ambient temperature, in the winter it averages around 42mpg and in the summer if it is very hot weather I can get 47 mpg and in average summer weather 45 is nearer the mark, impressive for a fairly heavy vehicle
     
  9. Avocet1

    Avocet1 Well-Known Member

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    Wow! I've been keeping a log of ours on an app and since I got it last May, it has averaged 33.28 MPG. Best fillup has been 37.12 and worst (yesterday towing about 1.5 tons) was 27.4 MPG.
     
  10. Nodge68

    Nodge68 Well-Known Member

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    Mine has done about 28 Mpg over the 4 years I've had it.
     
  11. Avocet1

    Avocet1 Well-Known Member

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    But yours is a V6 petrol auto, isn't it?
     
  12. Nodge68

    Nodge68 Well-Known Member

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    My current one is a TD4 auto.;)
    My V6 auto did 19 Mpg.:eek:
     
  13. Jimbob1

    Jimbob1 Member

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    Thanks.
    Mine does 28-29 mpg during summer and drops to 25ish in winter.

    No FBH (its the very basic E model).

    Thanks for the replies. Ill stop worrying about it then.

    Cant wait for thick snow to see how good these Malatesta Kobra's are like as rheyre fairly crap on road.
     
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