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Vy commodore fuel economy

Started by _JNR_ATE_ , Mar 19 2014 08:54 PM

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27 replies to this topic

#1 _JNR_ATE_

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Posted 19 March 2014 - 08:54 PM

Hi guys. I know it's commodore but I can't post in street commodore forum yet.
I just got a 2004 VY one tonner, ecotec 6, auto
Fuel economy is BAD. 14.2ltr/100km.
300km to a tank.
They can't be that bad can they?
Suggestions please.

Thanks.

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#2 dattoman

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Posted 19 March 2014 - 09:05 PM

That is bad

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#3 mitchg

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Posted 19 March 2014 - 09:08 PM

O2 sensors. Even if a code isnt thrown, they can make it reallllyyy bad.

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#4 r2160

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Posted 19 March 2014 - 09:23 PM

I had a VT that was playing up. Turned out that one valve spring had broken at half a turn, and not only did the car run like a pig, but used heaps of juice. Have you thought about buying the software and cable and checking the computer out to see if it tells you anything?

http://www.ebay.com....376f051e&_uhb=1

cheers

Glenn

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#5 _JNR_ATE_

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Posted 19 March 2014 - 09:36 PM

Runs fine. Starts fine, doesn't blow smoke. No codes, at Idle. 15.2l/100

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#6 S pack

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Posted 19 March 2014 - 09:38 PM

Hi guys. I know it's commodore but I can't post in street commodore forum yet.
I just got a 2004 VY one tonner, ecotec 6, auto
Fuel economy is BAD. 14.2ltr/100km.
300km to a tank.
They can't be that bad can they?
Suggestions please.

Thanks.

Haha, you think that's bad. My VZ 3.6L alloytec 4spd auto is worse. Average 16L per 100k's around town.

I'd be happier if mine was returning 14L per 100.

Edited by S pack, 19 March 2014 - 09:40 PM.

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#7 rodomo

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Posted 19 March 2014 - 09:48 PM

Are we going on actuals here or relying on the unreliable gizmo on the dash?
I have an 04 VY Crewman with the early engine and it says 10L/100

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#8 _UCLX_

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Posted 19 March 2014 - 09:54 PM

I concur, check the O2 sensors.

My 2004 VY series 2 crewman 3.8 auto stock standard returns 11.5 litres per 100 klm average around town, and 9.5 to 10.0 out on the highway.

Am cheating just a little bit, I am using ULX-110 5W - 40 grade oil. This oil is super slippery.

Cheers,

Daryl.

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#9 mitchg

The guy with the Torailer

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Name:Mitch
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Posted 19 March 2014 - 09:54 PM

My high stall ls1 gets 300kms to a tank so something is wrong with yours.

O2 sensors, clean maf / air filter / throttle body. Busted cat?

As I said, I had no codes but used so much fuel (when it was stock), changed o2 sensors and fuel economy jumped by 100+kms

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#10 _JNR_ATE_

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Posted 19 March 2014 - 11:00 PM

Nope. 298km to the tank. Might of squeazed 330 maybe.

Will change out and let you boys know.
Thanks.

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#11 _Macca97_

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Posted 20 March 2014 - 09:36 AM

thats bad, our big WH(VX/VY equvelent) stato with the 3.8 gets 8.6L per 100

Vz crewman with crappy 3.6 gets 10-11L oer 100

Defently something wrong with yours, maybe wear lighter shoes

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#12 gad05

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Posted 20 March 2014 - 09:45 AM

My series 2 vy ute gets 9•8 ,9•9 l per 100.
Definitely a problem there.
Cheers Gad.

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#13 _judgelj_

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Posted 20 March 2014 - 10:21 AM

My mates vz ss gets 4-450

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#14 yel327

Oh My, Don't you post alot

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Posted 20 March 2014 - 10:22 AM

That is OK for a V8 auto but not for the budget engine. My V6 auto Hilux 4x4 averages 14 on E10 and I drive it hard!

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#15 myss427

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Posted 20 March 2014 - 10:37 AM

My LS1 Monaro gets 11's arround town (if driving sensible) so you got a problem there.

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#16 _JNR_ATE_

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Posted 20 March 2014 - 11:03 AM

Ok. 2 good second hand ones fitted. Trip gauge still reads 14.2/3 but will see what in get per tank. 160 to nearly half tank.
O2 sensors where very white.

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#17 _outer control_

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Posted 20 March 2014 - 01:20 PM

Some engines are frieks we had a vy spack auto that returned 800 to 850 kms between tank fills and that wasnt a trip. Told buyer and i dont think he believed me but rang 6 weeks later singing its praise (the cost of updating)

Edited by outer control, 20 March 2014 - 01:21 PM.

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#18 _JNR_ATE_

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Posted 20 March 2014 - 03:37 PM

Ok. 2 good second hand ones fitted. Trip gauge still reads 14.2/3 but will see what in get per tank. 160 to nearly half tank.
O2 sensors where very white.

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#19 arrimar

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Posted 20 March 2014 - 03:54 PM

Our L34 used 682 litres (180gal.) on the trip to Phillip Island and back.
4,500kms @ 15.15L/100km.
2,796m@ 15.53mpg.
First 1,700kms were highway 107kmh @2,500rpm We were getting 17.3mpg.