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Thread: D3 TDV6 poor fuel economy

  1. 14th December 2015, 08:26 PM #1
    Timmy
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    D3 TDV6 poor fuel economy

    Surprisingly I couldn't find many posts about D3 TDV6 poor fuel economy! I guess this is a good thing. Just the recent thread, but that just came from a service...

    I bought a D3 TDV6 about a month ago - beautiful car to drive! My only concern is the economy.

    The car gets driven around town mostly by my wife. She's no leadfoot and the car is never heavily loaded. I've been tracking economy by filling up right to the filler neck so I know I'm getting the right readings.

    Trip computer calculates around 14.6-15L/100km, however I just calculated 16.8L. This seems a lot, even for around town! Lots of people are suggesting 10L/100km open road, and 11-13L/100km around town.

    I thought it may have been the full roof rack, but taking that off has actually made no noticeable difference. The car has a pair of rocksliders that would add a bit of weight. I thought that maybe the 285/35R22 tyres/wheels - Maybe adding rotating mass and more contact with the road from the width?

    The car apparently has a remap of some sort, but I'm not sure what brand - perhaps it's some average tune that's thumping diesel through?

    What are the usual culprits for increasing economy on these?
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  2. 14th December 2015, 08:30 PM #2
    BobD
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    How is your air filter?
    Bob

    2010 D4 3.0TDV6 SE, ediff, LLAMS, 5 x GOE wheels, LT285/60R18 BFG K02's, GOE Compressor Guard, LR Tank, Mitch Hitch, ECB Bull Bar, Kaymar Rear Bar, Traxide, Safari Snorkel.
    2019 Discovery 5 SD6 SE, 20 inch wheels, 275/55R20 Nitto Grappler G2 tyres
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  3. 14th December 2015, 08:32 PM #3
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    LandyAndy
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    Check your tyre pressures.
    Andrew
    DISCOVERY IS TO BE DISOWNED
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  4. 14th December 2015, 08:34 PM #4
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    Meken
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    D3 TDV6 poor fuel economy

    Maf sensor need cleaning? Egr valve ?
    & try a brick behind the accelerator pedal
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  5. 14th December 2015, 09:07 PM #5
    Timmy
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    Quote Originally Posted by BobD View Post
    How is your air filter?
    Just checked, bit of dust, but not crazy like some I've seen! Looks quite new. First time I've had to unscrew an airbox as opposed to unclipping.



    Quote Originally Posted by LandyAndy View Post
    Check your tyre pressures.
    Andrew
    Aired up the other day, sitting at 45psi a corner (quite low profile, so need a bit).


    Quote Originally Posted by Meken View Post
    Maf sensor need cleaning? Egr valve ?
    & try a brick behind the accelerator pedal
    These things are probably next to try. Now to find them on this thing! Seems to get quite hot under there.
    Brick idea is just mean lol
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  6. 14th December 2015, 09:13 PM #6
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    LandyAndy
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    Get the brick from a Toyota owner,they use it on the other side of the pedal
    Andrew
    DISCOVERY IS TO BE DISOWNED
    Midlife Crisis.Im going to get stuck into mine early and ENJOY it.
    Snow White MY14 TDV6 D4
    Alotta Fagina MY14 CAT 12M Motor Grader
    2003 Stacer 525 Sea Master Sport
    I made the 1 millionth AULRO post
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  7. 15th December 2015, 08:46 AM #7
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    shanegtr
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    Quote Originally Posted by LandyAndy View Post
    Get the brick from a Toyota owner,they use it on the other side of the pedal
    Andrew
    I thought it was to replace the non functional handbrake
    Shane
    2005 D3 TDV6 loaded to the brim with 4 kids!
    http://www.aulro.com/afvb/members-rides/220914-too-many-defender-write-ups-here-time-d3.html
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  8. 17th December 2015, 04:56 PM #8
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    D3 TDV6's are pretty heavy on fuel around cities.
    Because I live in the bush I was shocked & stunned last time I was in Townsville, went from about 10.5LPH to over 15LPH in a week.
    Jonesfam
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  9. 18th December 2015, 07:33 AM #9
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    Narangga
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    Quote Originally Posted by jonesfam View Post
    D3 TDV6's are pretty heavy on fuel around cities.
    Because I live in the bush I was shocked & stunned last time I was in Townsville, went from about 10.5LPH to over 15LPH in a week.
    Jonesfam
    Seems the read out in the message centre is regularly about 1 litre lower than actual.

    Jonesfam figures are pretty much what we are getting. Last refill the wife didn't remember how many kms on the trip meter so not sure what it was exactly.

    Locally (less than 10km per run) is quite high but a run into town (over 30km along the highway) drops down to 10 - 11.
    Cheers, Dale
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  10. 18th December 2015, 12:09 PM #10
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    PeterOZ
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    I get around 10.5 to 11 around town and down around 7 on the highway


    tyre pressures, type of tyres


    MAF and MAP sensor clean


    put new air filter in either if it looks good.


    modify driving habits, sit in torque curve.


    My ex wife swore she did not flog the car but after driving with her a few times I soon saw where the fuel economy was going. I'll leave that discussion to you to have!!
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