VX SS fuel consumption

[kangavxss]

Since I bought my stock ss its used more fuel than it should (20L/100KM). I then had a small 217/217 cam kit installed, OTRCAI, Mafless tune, pacemaker tri ys and 2.5" twin system with
100cpsi high flow cats, changed lifters, 25% ud balancer, new plugs and leads and changed all 02 sensors + changed fuel filter etc. It has 265 RWKW now. Fuel usage has not changed with the mods and remains the same as when it was stock. I believe it should use around 15L/100KM on average. Any one know what else I could check/change as to why it sucks so much fuel, even if i baby it around (which is hard to do). Car has 72,000KM only....
Cheers

[tezza]

How are you checking the fuel consumption, filling it full, resetting the trip computer and then when you fill it again full, note down the kms travelled?
Also what type of driving do you do.

On a stock manual with all city driving (20-30 mins max) I get about 17-18L/100kms as comparison

[TonyJZX]

i'd agree with this guy

autos are a tad worse than manuals

what do you get pure freeway?

[Drewie]

I have had my VX SS from new, completely stock standard, around town I would estimate it gets around the mid teens never really accurately checked it,
but have checked it on a few long highway trips (500 to 600km) and it is always around high 9's to 10 litres per 100 km on the highway. Car has about 73,000km on the clock, it is an auto.

[kangavxss]

Thanks for the replies. Filling from almost empty , takes 70 litres, so guage is ok. Do mainly suburbs driving , 60 to 80 kms per hr. and been driving fairly sedately most of the time. Its an auto.
Cheers

[kangavxss]

Yeah using trip computer and working out usage from there as i have said above.

[kangavxss]

i'd agree with this guy

autos are a tad worse than manuals

what do you get pure freeway?

Hardly do freeway as work is 15 min away in the burbs..so dont know m8

[kangavxss]

I have had my VX SS from new, completely stock standard, around town I would estimate it gets around the mid teens never really accurately checked it,
but have checked it on a few long highway trips (500 to 600km) and it is always around high 9's to 10 litres per 100 km on the highway. Car has about 73,000km on the clock, it is an auto.

Cheers. Mid teens is what i wud expect too..

[Huntington]

you did all that work and you drive it sedately? i think the problem lies in the having to much fun after the mods you have done..... thats where my fuel consumption problem lies anyway

[kangavxss]

Driving that way only to find out what the actual consumption is with normal use to see if there is a problem. Of coarse I have given it some WOT (crazy not to).

[HamaTime™]

Seems way too high mate.

Check with your tuner as to his thoughts. Might also pay you to check your O2 sensors as a starting point as if they are old/faulty they can affect fuel usage.

[Drewie]

For what it is worth this is the Fuel sticker off my VX SS when I bought it new. I realise the figures were done in a controlled environment but might give you an idea of the official figure that was quoted when new. I think it is supposed to be a combined figure for metro and highway, not really sure how they proportioned the figures though.

[kangavxss]

Id be happy with 15 or 16 . Cheers

[kangavxss]

Saw the tuner and he tweeked a few things. Replaced o2 s a few months ago..

[tezza]

Hardly do freeway as work is 15 min away in the burbs..so dont know m8

There lies your problem. Your just doing short trips and the car has only just warmed up before you switch it off again.

[kangavxss]

There lies your problem. Your just doing short trips and the car has only just warmed up before you switch it off again.

You may be right. Might have to get a cheap 4 cylinder for driving to work..lol

[monkeys437]

You may be right. Might have to get a cheap 4 cylinder for driving to work..lol

Dont think you would save much money with a 4cyl runabout. If its a 15min drive your probs only doing 30k round trip for the day. Thats still only 6L per day or $9 in premium fuel. Even if your halved your fuel bill with a shitbox you're barely saving enough to cover rego for the year. I say keep driving your beast and waste as much fuel as possible before the Greenies make it a Jailable offence

[kangavxss]

probably have to buy a cheap 4 Cyl sometime anyway as my son will soon be 16 and will be getting his license ( he sure as hell isnt going to practice driving in my car LOL.)