Consumption seems high





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  1. #1
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    Default Consumption seems high

    Hi,

    I just drove this vehicle (2006 KB300 LX 4X4, 235 000km) down from Pietermaritzburg. I made a note of diesel consumption along the way and it was around the 8.5 Km / litre mark. That seems pretty high to me but I'm new to this so could someone please confirm?

    If it is high then what are the most common causes for a bakkie this age - cats, emissions regulator?

    Thanks,
    ross

  2. #2

    Default Re: Consumption seems high

    What about mods ? Tyres ? Suspension? Racks ?
    Heike Pinto,

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  3. #3
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    Default Re: Consumption seems high

    That is high, my FJ should get close to that!!
    FJC - Just Cruising

  4. #4
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    Default Re: Consumption seems high

    That is a bit high, but not out the window. All depends on modifications done, and one must remember it is a 4x4.

    How is the service history?

  5. #5
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    Default Re: Consumption seems high

    What speed?

  6. #6
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    Default Re: Consumption seems high

    Thanks for the replies.

    It was my fathers. It's done a lot of overlanding in Southern Africa but it's been properly serviced throughout it's life. We removed the roof rack before coming down and other than that the only mod he's done to it is to fit CB radio and Battery for the fridge. So it's pretty much standard in terms of mods that would affect consumption.

    245/70 R16 - also standard.
    speed 120-140kph.

  7. #7

    Default Re: Consumption seems high

    Quote Originally Posted by no1_rossco View Post
    Thanks for the replies.

    It was my fathers. It's done a lot of overlanding in Southern Africa but it's been properly serviced throughout it's life. We removed the roof rack before coming down and other than that the only mod he's done to it is to fit CB radio and Battery for the fridge. So it's pretty much standard in terms of mods that would affect consumption.

    245/70 R16 - also standard.
    speed 120-140kph.

    Maybe it is not so bad consumption on those speeds , but I would suggest getting your intake manifold cleaned; attached is mine at 210.000 km.

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    Heike Pinto,

    - 2014 Mazda BT-50 3.2TD 4x4 AT
    3" Exhaust | iDrive | HDi Intercooler Upgrade | Forefront Industries Alloy Boost pipes | Hybrid Turbo | 30% Nozzles | K&N Air Filter
    Fuel Injection Technology ECU Tune


    -2009 Isuzu Dmax 3.0 TD 4x4 MT

    Maputo, Mozambique

  8. #8
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    Default Re: Consumption seems high

    Quote Originally Posted by no1_rossco View Post

    245/70 R16 - also standard.
    speed 120-140kph.
    Hmm yes, revs would be quite high and consumption climbs exponentially.

  9. #9
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    Default Re: Consumption seems high

    Quote Originally Posted by jelo View Post
    Hmm yes, revs would be quite high and consumption climbs exponentially.
    Yip. Drag forces are 44% higher at 140km/hr than at 120km/hr


  10. #10
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    Default Re: Consumption seems high

    Quote Originally Posted by mikeml View Post
    Yip. Drag forces are 44% higher at 140km/hr than at 120km/hr
    That's interesting, I did not know that!
    That wasn't a consistent 140 though, just what it climbed to occasionally. Maybe should've said 120-130 to give a better idea.

  11. #11
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    Default Re: Consumption seems high

    Quote Originally Posted by heikeedwin View Post
    Maybe it is not so bad consumption on those speeds , but I would suggest getting your intake manifold cleaned; attached is mine at 210.000 km.

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    https://youtu.be/T8yoCoRrGP8
    Thanks Heike, I will do this and the EGR clean when I get the time.

  12. #12
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    Default Re: Consumption seems high

    When you say "drove it down" - down to where? If down to Durban then your consumption is high. Anywhere else from PMB is uphill and at those speeds, 4 x 4 etc, it becomes normal.

  13. #13
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    Default Re: Consumption seems high

    Quote Originally Posted by jaconell View Post
    When you say "drove it down" - down to where? If down to Durban then your consumption is high. Anywhere else from PMB is uphill and at those speeds, 4 x 4 etc, it becomes normal.
    to Cape Town

  14. #14
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    Default Re: Consumption seems high

    I had a Hilux KZTE. Comparable tegnology and the fuel consumption were way worse!

    Bostoe

  15. #15
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    Default Re: Consumption seems high

    Your consumption highesh. Buy pressurized cannister of lens/camera cleaning cannister, take out MAF sensor and blow clean. Real easy.

    Should make a difference. Having said that, lots of foot-flat overtaking will kill consumptuon. Methinks you are borderline ok.

  16. #16
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    Default Re: Consumption seems high

    8.5 km/l or 8.5l/100km.
    Was that on the display or actual calculations km/l?
    How accurate is your speedo?
    9.5-10.5 is what i normally get with the speedcontrol set on 110km/h GPS speed. speedo reads 115
    Last edited by Pieterk; 2019/11/22 at 08:16 PM.
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  17. #17
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    Default Re: Consumption seems high

    Quote Originally Posted by no1_rossco View Post
    to Cape Town
    From PMB to Van Reenen it's up a steep incline. At 120 - 130 you're going to drink diesel. From Van Reenen the down to Cape Town is gradual for 1300 km. The vehicle won't save much on that part of the trip at 120 - 130. My Isuzu 2.8 and JMC 2.8 both drink diesel around 120 and more. At 110 they're surprisingly lighter on diesel.
    Last edited by Olyfboer; 2019/11/22 at 11:34 PM. Reason: Spelling
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  18. #18
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    Default Re: Consumption seems high

    Quote Originally Posted by Pieterk View Post
    8.5 km/l or 8.5l/100km.
    Was that on the display or actual calculations km/l?
    How accurate is your speedo?
    9.5-10.5 is what i normally get with the speedcontrol set on 110km/h GPS speed. speedo reads 115
    Based on your figures above of approx 10l/100km @ 110km, 8.5km/l sounds spot on for 120 to140km/hr

    Drag forces really come into play at higher speeds above 80km/hr. Drag forces are 19% higher at 120km/hr than at 110km/hr. The increase in consumption is not just due to drag forces, but as an indication, add 19% to 10l/100km and you get 11.9l/100 = 8.4km/l.


  19. #19
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    Default Re: Consumption seems high

    Quote Originally Posted by no1_rossco View Post
    Hi,

    I just drove this vehicle (2006 KB300 LX 4X4, 235 000km) down from Pietermaritzburg. I made a note of diesel consumption along the way and it was around the 8.5 Km / litre mark. That seems pretty high to me but I'm new to this so could someone please confirm?

    If it is high then what are the most common causes for a bakkie this age - cats, emissions regulator?

    Thanks,
    ross
    As far as i know the 2006 Go bigs, did not have catalytic converters, but yes i would say get an EGR clean, your engine will be happy with you.

    My dad owned one of these models and as it got older it's consumption did get worse, but those things are bullet proof, he sold it with 340k on the clock with only a new clutch on 200k.
    2017 Isuzu KB 300 4X4 Auto (current)
    2008 Isuzu KB 300 4X4 manual (current)

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