My Vy 3.8l fuel consumption seems high

[Stephentsikleas]

My VY COMMODORE 3.8L is registering 15l or less per 100km around town and traffic lights but the computer seems indicate a diffrence of kilometres fuel left to the actual kms im traveling. And im wondering is it a computer problem or air flow meter or pther reason.

 

[Whiteshark68]

it will depend on the type of driving you are doing and what your average speed is
my trip computer always says my avg litres per 100lkm is always around 18 - 19 but my avg speed is always only about 25km/hr but i only do short distances on average of about 3kms or less per trip but when i do a long trip it falls to around 8 - 10 ltrs/100kms

 

[krusing]

Same with my VY Super6, around the suburbs is says approx. 14 > 17 [depends the traffic, and how I drive ],
Out on the highway it can come down to approx. 8.4 [krusing at 100 > 110km/h] [no pun intended ]
Not bad for a Super6, as it breaths a lot better.

 

[delcowizzid]

My vx does 11.7-12 average city usage mostly 50kmh zones and a big hill in and out of my suburb. Start stop in traffic is a big killer of fuel economy in these things when you watch the instant litres/100 taking off you will see why lol

 

[Whiteshark68]

My vx does 11.7-12 average city usage mostly 50kmh zones and a big hill in and out of my suburb. Start stop in traffic is a big killer of fuel economy in these things when you watch the instant litres/100 taking off you will see why lol

On the occasion that i have my trip meter on instant fuel when i take off even while driving like a granny it peaks at over 50litres/100kms and if i drive more spiritedly it hits 99+

 

[delcowizzid]

When cold mine will go high 40s taking off gently when hot its goes around 14 that's driving as efficient as possible. Mines real high ks 500000+ and I've tweaked it a bit o2 sensors are turned off and egr switched off in the tune and blocked off and has a few timing tweaks in the tune but a stock one should return similar .If your o2s are old and tired won't help the situation mine are turned off un till I fix my leaking inlet gaskets and fit the new 1s I have on the shelf

 

[krusing]

On the occasion that i have my trip meter on instant fuel when i take off even while driving like a granny it peaks at over 50litres/100kms and if i drive more spiritedly it hits 99+

That's normal, because that's live data, and/or momentary data
Where the computer works on an average [speed/air mass/revs/throttle position/load/type of fuel/type of driving].