Isuzu KB300 Correct Fuel Consumption





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  1. #1
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    Default Isuzu KB300 Correct Fuel Consumption

    Hi All

    I'm new to diesels & double cabs & I'm about to buy a 2005 KB300 TDi LX 4X2 D/C. However, what puzzles me is the different fuel consumption figures given for this vehicle.

    A number of members here claim 10km/l meaning that on a 75l tank they should get 750km but they only actually get 500km.

    Car magazine quotes a consumption of 11.2l per 100km - How accurate is this in the real world ?

    What mileage do current owners get per tank ? Please help me get as accurate a figure as possible. I understand driving-style comes into play but for the sake of this exercise let's base it in the 'the perfect driver'

    Thanks in advance

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    Quote Originally Posted by YzeOne View Post
    Hi All

    I'm new to diesels & double cabs & I'm about to buy a 2005 KB300 TDi LX 4X2 D/C. However, what puzzles me is the different fuel consumption figures given for this vehicle.

    A number of members here claim 10km/l meaning that on a 75l tank they should get 750km but they only actually get 500km.

    Car magazine quotes a consumption of 11.2l per 100km - How accurate is this in the real world ?

    What mileage do current owners get per tank ? Please help me get as accurate a figure as possible. I understand driving-style comes into play but for the sake of this exercise let's base it in the 'the perfect driver'

    Thanks in advance

    I get between 10 and 11km/L. Don't worry about the tank size, the light will go on after 550km, but then you will have 20L left in the tank.

    I think it is a safety thing as Isuzu don't want you to run the tank dry.

  3. #3
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    I have 265/70/16 MT tyres and raised suspension. I get around 9-10 km/lt. Your 4x2 should in theory get more because it weights less (no transfer case, front diff...) and you probably run the standard size tyres.
    Yes, the light normally comes on around 500-550km mark because you have a big reserve and running the tank empty will damage your fuel pump. There is a way to get more fuel in with small modification to the tank. The breather pipe sits quite low in the tank, so all you do is fit a new breather pipe on top of the tank. You can then fill up with around 20-30lts more.
    JP

    Isuzu KB300 D/C 4x4 (KB6)

  4. #4
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    Default Isuzu KB 300Fuel Consumption

    I have a 2004 KB300 TDi LX S/C used as a work bakkie. Steel canopy & steel carrier for materials. Has around 220 000km on clock. With load, start stop driving. A/C on etc I used to get 9 - 10km/litre (10 - 11 l/100km). I handed it down @ 204 000km & the drivers
    get a little worse. But never worse than 8.4km/l (12.0l/100km). I used to often see 700, 750k's before light came on. Best ever was 775km. Incidentally, the consumption has not deteriorated due to the mileage, more due to the drivers. Also have a 2010 KB300 D-Teq, which I now use, much more power, much lighter on fuel. Far superior motor to the Toyota 3.0D-4D in my Fortuner. But an Isuzu Truck mechanic friend prefers the 'old' KB280/300 motor to the D-Teq - cheaper & easier to repair & more reliable, he says, than the modern D-Teq...

  5. #5
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    My een kollega het dieslfde lorrie as ek 300tdi LX D/C en hy kry 13km/L (geen chip)

    Ek hom eers nie geglo en nou neem hy foto's van die kilo's en waar sy naald le en 'n strokie van hoeveel kilo's hy gery het en hoeveel lieter hy ingegoei het.

    Ek sukkel om 11km/l te kry

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    Default m2cw

    I drive the 4x4 version, and my fuel consumption (real average over 122000km) is 8.9Km/l.

    My day-to-day driving average is 9.5km/l, but long-haul trips (with roofracks and trailer) brings the average down.

    The 4x2 should average above 10km/l.

    The tank issue: yes, my fuel light also comes on once 55l have been consumed. The reserve tank is between 15 and 20l. I have now fitted a Front Runner additional tank which increased my distance between refills to 1300km
    Francois Johnson





    (swambo: Christel)

    Our rides
    • 2010 Isuzu KB300LX DTeq 4x4 D/C
    • Metalian Maxi Trailer, Maxine

  7. #7
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    Default Fuel

    ISUZ KB300 LX 4X4
    2'' lift
    245 75 16 GY Wrangler MTR's

    I get about 9-10 Km's L Driving less than 120

    Driving at 160+ I get 170km's on a tank

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    Be very careful. I had a problem with one and she never ever got above 7.5km/l at 100km/h. I tried many many times and places to find the problem and sold it as is. A late friend of mine had single cab with the same issue. Also between the 5-7.5km/l mark. Switched to a D4d and got 10-12km/l. Would still love to know the real issue. Spoke to a chap at Bosch and he says he has seen a couple do the same over the years.
    '18 Hilux 2.8 Auto 4wd
    '19 Fortuner 2.8 Auto 4wd

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    My bakkie is stock standard, but 4x4. In town it averages around 8.5km/l. Open road just under 11km/l. I see my average over the last about 14 000km was 10.16km/l, which was a mix of town, highway and some light off road/dirt road driving. I pretty much keep to the speed limits, although going through Transkei and trying to pass the odd line of "truck-trains" saw some very high speeds...

    My diesel light comes on on nearly exactly 60liters used, which, obviously depending on terrain is normally around the 600km mark.
    Last edited by walkabout; 2011/02/04 at 04:45 PM. Reason: average recalculated
    2009 VW Touareg 3l V6 TDi
    2006 Isuzu DMax 300Tdi DC 4x4 (sold)

  10. #10
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    I keep detailed records of the fuel consumption of my 2003 KB300 TDI LX D/C.
    My driving style is generally but not always gentle. Overall consumption over 52,000 Km is 12.01 Km/L (8.32L/100km). Even when driving quite hard or towing my Sprite Musketeer caravan, the consumption has never gone below 10Km/L. Best is 13.3Km/L with the tankful giving me just over 1000 Km.
    Tank size is 83 liters with low fuel warning light coming on with about 5L in the tank.

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    Quote Originally Posted by Tom51 View Post
    I keep detailed records of the fuel consumption of my 2003 KB300 TDI LX D/C.
    My driving style is generally but not always gentle. Overall consumption over 52,000 Km is 12.01 Km/L (8.32L/100km). Even when driving quite hard or towing my Sprite Musketeer caravan, the consumption has never gone below 10Km/L. Best is 13.3Km/L with the tankful giving me just over 1000 Km.
    Tank size is 83 liters with low fuel warning light coming on with about 5L in the tank.
    Hi all, also 2003 KB300 TDI LX D/c.(now with SAC clip)....I get +-830km for on average 74l (in town, not long distance) i.e. roundabounts 11.75km/l on avearge.

    Long rage @ 120km/h the average 10km/l and

    Towing a Regal caravan no more than 100km on average, and always in 4th gear, then 8km/l.. I'm quite happy with this, in fact

    I'm busy investigating a body lift / replacement of tyres to 31" or 32" and is a bit worried of the effect on consumption...any thought here?)

  12. #12
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    Quote Originally Posted by Big E View Post
    I get between 10 and 11km/L. Don't worry about the tank size, the light will go on after 550km, but then you will have 20L left in the tank.

    I think it is a safety thing as Isuzu don't want you to run the tank dry.
    I have tested this a while ago and found that there is no ways that tank holds 75 l with a 2ol reserve.
    I ran for a while with a 20l tank of diesel in the back. As I felt the bakkie run out of fuel, i stopped an put in the 20l. Filled up at the next filling station and got in about 40l if I remember correctly. Dont trust the 20l reserve!!!!
    "Anybody can do just about anything with himself that he really wants to and makes up his mind to do.
    We are all capable of greater things than we realize"
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  13. #13
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    Quote Originally Posted by JPD View Post
    I have 265/70/16 MT tyres and raised suspension. I get around 9-10 km/lt. Your 4x2 should in theory get more because it weights less (no transfer case, front diff...) and you probably run the standard size tyres.
    Yes, the light normally comes on around 500-550km mark because you have a big reserve and running the tank empty will damage your fuel pump. There is a way to get more fuel in with small modification to the tank. The breather pipe sits quite low in the tank, so all you do is fit a new breather pipe on top of the tank. You can then fill up with around 20-30lts more.
    hoor ek reg? 20 -30l meer? so nou vat jou tenk bv 100l? nie geweet dis so baie nie

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    Quote Originally Posted by sjbosbfk View Post
    hoor ek reg? 20 -30l meer? so nou vat jou tenk bv 100l? nie geweet dis so baie nie
    My 2003 KB 3.0 DTI Lx D/C het 'n tenk van 83 lt. Die oomblik wat die liggie aankom gooi ek gemiddeled 74 lt in i.e. my reserwe is du +- 10l?.

  15. #15
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    Quote Originally Posted by sjbosbfk View Post
    hoor ek reg? 20 -30l meer? so nou vat jou tenk bv 100l? nie geweet dis so baie nie
    SJ, ek het gegaan op wat ander ouens gese het en het toe verlede week die mod op my eie bakkie gedoen. Ek kry nou so amper 20lt meer in. Ek ry so 150km voor die naald begin sak.
    JP

    Isuzu KB300 D/C 4x4 (KB6)

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    Got 2002 Isuzu KB280DTLX D/C. i get 16km/l when doing 90-110km/h. with the airconditioner on and carrying 5 heavily built man plus lagguge i get 14.5km/l doing 120km/h. urban driving with frequent stops and gear changes and limiting speed to 60km/h i get 11.3km/l. the low fuel warning light comes on midway betwwen 1/4tank and empty then fill up tank with 58-60litres. with the fuel gauge midway between 1/4 and empty i experience power loss probably due to partial air lock. heavy accelerating on low fuel seem to cause the 20litre reserve to drift backwards a little thereby introducing airlock in the system. the car is very efficient and powerful (i think its more than 74kw), am hesitant to upgrade to 300LX D-Teq.

  17. #17
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    once owned 1988 Isuzu KB250D S/C. Usually got 20km/l highway. the motor is underpowered 52kw and max speed of around 118 km/h.

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    The best I've done was 1262km on a tank
    .
    .
    .
    .
    .
    Just love the 125l tank

    average over 40000km 10.36l/100km
    I do have 2 roofracks
    3" lift
    Chip
    <b>2006 Isuzu KB 300 LX D/C 4x4</b>
    Calmini 3" Lift
    Unichip
    Rancho shocks

  19. #19
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    Check my Fuelly signature, roughly 10.4 l/100 km overall, and is not really affected that much by town or open road driving...
    Isuzu KB300 LX 4x2 DC Dmax (M) '07
    BMW E90 330i (M) '05 (His)
    BMW E46 320i f/l (M) '03 (Hers)
    ex Toyota Corolla 160i GLE (M) '99 - Photos

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    Hi guys interesting stuff , im new to the forum and looking at the a 300 kb as well 2007 model , is the 250 kb more economical ? and what sort of consumption will the 250 KB give ? 2006 and up models ? thanks .

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