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VZ Executive Auto Fuel Consuption 13-15L/100km

Discussion in 'VZ Holden Commodore (2004 - 2006)' started by dingdong555, Jul 25, 2011.

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  1. Jul 25, 2011 #1
    dingdong555

    dingdong555 New Member

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    Hi all.

    Got a VZ Executive auto which has "POWER" mode off and is being driven like any normal car, to give you an idea it shifts up at around 2000-3000rpm, no higher than that.

    However, my fuel consumption is NEVER below 13L/100km, I find this extremely hard to believe, so I reset the ECU (disconnected battery) and still get roughly the same. I've also had a service in the last 500km.

    Any ideas why? My folks VE SS Manual gets around 14L/100km and gets driven pretty hard.
     
    dingdong555, Jul 25, 2011
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  2. Jul 25, 2011 #2
    redvs2

    redvs2 New Member

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    Regularly serviced?
     
    redvs2, Jul 25, 2011
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  3. Jul 25, 2011 #3
    aaronevolution

    aaronevolution Donating Member

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    I get better economy out of my vz 6 spd SS 6 Litre than I did in my vy v6 and my VR v6.
     
    aaronevolution, Jul 25, 2011
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  4. Jul 25, 2011 #4
    dingdong555

    dingdong555 New Member

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    Yeap, all up to date with the log books.
     
    dingdong555, Jul 25, 2011
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  5. Jul 25, 2011 #5
    heyitsEnricoPallazzo

    heyitsEnricoPallazzo Big block Alloytec

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    heyitsEnricoPallazzo, Jul 25, 2011
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  6. Jul 25, 2011 #6
    doms1

    doms1 New Member

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    Yep our vz exex alloytec gets those sort of figures,pos of a thing
     
    doms1, Jul 25, 2011
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  7. Jul 25, 2011 #7
    jd hot stuff

    jd hot stuff 355 power

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    Funny how i just got 9.9L per 100km and my avg is no worse then 10.6L per 100km
     
    jd hot stuff, Jul 25, 2011
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  8. Jul 25, 2011 #8
    CAPRILICIOUS WL

    CAPRILICIOUS WL New Member

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    Could be ur oxy sensors.
    What petrol do u use?

    I just did my oxy sensors and it dropped from 18l/100km to 15l/100km @ an avg speed of 35km/h.
     
    CAPRILICIOUS WL, Jul 25, 2011
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  9. Jul 25, 2011 #9
    vz_sv6_owner1990

    vz_sv6_owner1990 New Member

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    Which lambda/Oxygen sensors did you change. All 4 Or just fronts or rears??
     
    vz_sv6_owner1990, Jul 25, 2011
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  10. Jul 26, 2011 #10
    CAPRILICIOUS WL

    CAPRILICIOUS WL New Member

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    I just changed the front two sensors before the cats.
    Do u know what the rears are good for? Do u reckon I should change the rears aswell?
     
    CAPRILICIOUS WL, Jul 26, 2011
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  11. Jul 26, 2011 #11
    vz_sv6_owner1990

    vz_sv6_owner1990 New Member

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    It pretty much does the same thing as the fronts but it measeures your exhaust gasses after the cat converter to see how much is getting trapped by the cat. And measures the fuel mixture to ensure no harmful gasses go out the exhaust... I'm prettY sure
     
    vz_sv6_owner1990, Jul 26, 2011
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  12. Jul 26, 2011 #12
    CAPRILICIOUS WL

    CAPRILICIOUS WL New Member

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    So do you reckon it will have anything to do with the performance of the car? The rear oxy sensors that is.
    I feel like my car is really sluggish but I dont know if it's just me. Lol
    But then again it's a 2ton + car.
     
    CAPRILICIOUS WL, Jul 26, 2011
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  13. Jul 26, 2011 #13
    aaronevolution

    aaronevolution Donating Member

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    2ton+? WL Caprice's weigh under 1800?
     
    aaronevolution, Jul 26, 2011
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  14. Jul 26, 2011 #14
    CAPRILICIOUS WL

    CAPRILICIOUS WL New Member

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    Not mine. Lol

    20" Rims+Tyres x 4 = 125kg
    70L LPG gas tank full = 100kg*
    75L petrol tank full = 90kg*
    2 x subs n amp = near 40-50kg*
    Me x1 500kg. Lol 80kg.
    * = rough figures.

    Total = Turtle. :p
     
    CAPRILICIOUS WL, Jul 26, 2011
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  15. Jul 26, 2011 #15
    imoore

    imoore New Member

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    the after cat o2 sensors are only there to monitor the cat efficiency. i believe the front ones are what make a real difference to fuel con and performance. My vz ute averages between 12.5 -13.
     
    imoore, Jul 26, 2011
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  16. Jul 26, 2011 #16
    vz_sv6_owner1990

    vz_sv6_owner1990 New Member

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    @caprilicious honestly they shouldn't be used for performance or fuel consumption at all im pretty sure they are only used to see how much stuff is going through the cats for EURO 4 emissions laws

    My advice would be to take them out and check to see if the tips are dirty.. If they look ok then leave it

    As I said I'm pretty sure they are only there to comply with EURO 4 emissions laws.

    Ps I'm only a 3rd year apprentice mechanic so I may be wrong
     
    vz_sv6_owner1990, Jul 26, 2011
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  17. Jul 26, 2011 #17
    Danoz

    Danoz New Member

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    Post your avg speed when posting your fuel consumption!
     
    Danoz, Jul 26, 2011
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  18. Jul 26, 2011 #18
    vz_sv6_owner1990

    vz_sv6_owner1990 New Member

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    I get average 15L/100km at 30km/h in my sv6 which I know is ####ed
     
    vz_sv6_owner1990, Jul 26, 2011
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  19. Jul 26, 2011 #19
    CAPRILICIOUS WL

    CAPRILICIOUS WL New Member

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    Thats exactly what mine is sitting at atm.
     
    CAPRILICIOUS WL, Jul 26, 2011
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  20. Jul 27, 2011 #20
    boogervz

    boogervz New Member

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    My VZ Wagon Exec does 11.5-12L/100km around 40-45km average speed..
     
    boogervz, Jul 27, 2011
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