Just wondering roughly what people are getting in the fuel economy average?

When I first got my 380 the first tank after a while was saying 14.8L/100km
I know have been behaving a little better and put in a K&N Airfilter and now dropped it down to 12.9L/100km. This is with the majority of driving going from Morphett Vale to Wingfield then back each day in peak hour traffic.
Is this normal or not so good and is there and cheapish way to make it a fair bit better?

Cheers,

It seems to be pretty mixed results with the 380's on here. Mine was all over the place when I first bought it but has settled down to a constant 11l/100 with majority town driving

haha. mines currently at 17.1 L 100kms, and last 3 tanks have been 15+

:eek2:....you do realise the throttle doesn't have to be mashed to the floor right? lol

on weeks with mostly urban driving it sits between 12.2-13.5L/100km. I live in a fairly hilly area though.

on weeks with mostly highway driving it sits between 9.3-11.5L/100km.

I find its a bit better on premium fuel (95RON) and synthetic motor oil. IMO if its higher than 15L/100km and you haven't been driving hard/sitting in traffic most of the time there may be problems.

I do about 35km/day at an average speed of probably 55km/h. The first ~17km is at 1am or so and I only ever have to stop at one set of traffic lights. The return trip is at about 10.30am so there's a bit of traffic, but it's generally flowing well.

I'm getting 11/100km on E10 with no mods.

haha. mines currently at 17.1 L 100kms, and last 3 tanks have been 15+

unscrew the accelerator pedal from the floor. cheap u only need a phillips head! lol

Just wondering roughly what people are getting in the fuel economy average?

When I first got my 380 the first tank after a while was saying 14.8L/100km
I know have been behaving a little better and put in a K&N Airfilter and now dropped it down to 12.9L/100km. This is with the majority of driving going from Morphett Vale to Wingfield then back each day in peak hour traffic.
Is this normal or not so good and is there and cheapish way to make it a fair bit better?

Cheers,

if you haven't done the 90mm intake and resonator mods, start there. they pay for themselves real soon. Best I have got on a run from Newcastle to Sydney is 7.9L/100km driving really easy though (read econorun). Normally I am around high 9-mid 10's. mixture work commute and highway.

Cheers for the insight guys. im doing 40kms to work then further 40kms back home each day and just running on normal unleaded 91. I might see how I gow with E10 and 95 see what the differences are. I am looking into the 90mm intake and might do that hopefully soon.

380matey, Have you got the stock exhaust or higher flow one with those figures?

:eek2:....you do realise the throttle doesn't have to be mashed to the floor right? lol


unscrew the accelerator pedal from the floor. cheap u only need a phillips head! lol

haha i think the issue is more the fact that average speed on those tanks is like 30-33kms an hour. is usually a 4km trip to work in the morning (with four sets of traffic lights) , a trip down to the shop maybe 1km either way at lunch, then 4(or maybe five if i go another route to break routine) home at night. so it never really gets warmed up.
not saying im not heavy on the throttle but def isnt the only reason :P

We've already got a massive thread on this -

http://www.aussiemagna.com/forums/showthread.php?t=69858&highlight=fuel+economy

Please use the search function.

my 380 used to average around 11.8l/100kms but since i got my territory last year the traffic has gotten worse, especially over the westgate bridge but the Territory does around 10.6. on a recent trip to wagga and back it averaged 8.2.

my tj magna would get around 10.5

i used to fill up twice a week with the 380 but now i only have to fill up once. i could only get 520 kms out of a tank whereas the territory gives me around 650

its normal, the 380 is a very thirsty car. i owned it from new but got rid of it after 2 and a bit years.

The 380 is a very thirsty car. Mine uses around 14-16 lph in city driving with an average speed on the trip computer of under 35kph.

It uses more fuel in town than my last car - the FG XR6 Turbo and that had 270kw, 533nm and weighs more than the 380. And I used to push it harder than the 380. The turbo is more modern though and an extra gear on the auto box.

Overall - not that impressed with fuel consumption.

Cheers for the insight guys. im doing 40kms to work then further 40kms back home each day and just running on normal unleaded 91. I might see how I gow with E10 and 95 see what the differences are. I am looking into the 90mm intake and might do that hopefully soon.

380matey, Have you got the stock exhaust or higher flow one with those figures?
I have a redback straight through muffler on the rear.Nice note under acceleration but very quiet under normal travel, which is what I wanted. You don't have to look into the 90mm intake, just do it!! It has been tried and proven by numerous people on this site, myself included. You will notice a change in the economy, for the better. I noticed around 1L/100km after doing it and others have experienced much the same. It is a No Brainer. When and if you do the rear muffler make sure that they cut off the flange at the rear of the OEM one as it stages down the 2 1/2" system to a 2 1/4"!! Get them to weld a new flange in place that is 2 1/2" so that you can bolt on and off mufflers. I didn't notice any change in normal travel economy, but when I was towing the camper and it was working harder there was a noticeable change in both response, power and some economy. Hope this helps.

cheers 380matey. I will definately do the intake mods and how much does a new muffler roughly cost?

The 380 is a very thirsty car. Mine uses around 14-16 lph in city driving with an average speed on the trip computer of under 35kph.

It uses more fuel in town than my last car - the FG XR6 Turbo and that had 270kw, 533nm and weighs more than the 380. And I used to push it harder than the 380. The turbo is more modern though and an extra gear on the auto box.

Overall - not that impressed with fuel consumption.

Yours is a manual transmission 380?

Yours is a manual transmission 380?

nah GT auto

nah GT auto


Something is rooted with it.

I can get better fuel economy in my TMR380.

Probably 02 sensors,injectors...who knows...unless you drive it like you stole it...lol



The 380 is a very thirsty car. Mine uses around 14-16 lph in city driving with an average speed on the trip computer of under 35kph.

It uses more fuel in town than my last car - the FG XR6 Turbo and that had 270kw, 533nm and weighs more than the 380. And I used to push it harder than the 380. The turbo is more modern though and an extra gear on the auto box.

Overall - not that impressed with fuel consumption.



BTW...XR6T uses just as much fuel when driven as hard....and it doesn't weigh more than a 380, it weighs about the same....but my GT weighs in at 1880 kg.s with the LPG kit.

I took one out for the day and drove it till the tank needed filling...about 13.5l/100k ...or 450k's per tank.

Something is rooted with it.

I can get better fuel economy in my TMR380.

Probably 02 sensors,injectors...who knows...unless you drive it like you stole it...lol


The thing is when the car is at speed - whether 60kph, 80kph or 100kph the instant consumption is good. At 100kph it is typically showing 7.8litres on a flat road (or lower) and mostly always under 10 litres per hundred at other speeds on a flat road. What I find kills the consumption is stop start driving. Accelerating from stand still normally shows very high instant consumption - 60 litres ph+.

My average speed over a tank according to the trip is between 30-35kph - which illustrates how much stop start driving I do.

I can assure you in the same circumstances the FG XR6 turbo is more efficient. I use the same route every day and the FG handles the stop start driving much better in terms of consumption.

The thing is when the car is at speed - whether 60kph, 80kph or 100kph the instant consumption is good. At 100kph it is typically showing 7.8litres on a flat road (or lower) and mostly always under 10 litres per hundred at other speeds on a flat road. What I find kills the consumption is stop start driving. Accelerating from stand still normally shows very high instant consumption - 60 litres ph+.

My average speed over a tank according to the trip is between 30-35kph - which illustrates how much stop start driving I do.

I can assure you in the same circumstances the FG XR6 turbo is more efficient. I use the same route every day and the FG handles the stop start driving much better in terms of consumption.


A bit of advice for you...get the Impco sequent 56 LPG kit for your 380.

It will blow you away with how seamlessly it works and how cheap the car is to run.

380 has average fuel consumption for the V6s. Urban around 15-16l highway around 8-10l. I am averaging anything from 14 - 16l with the average speed over working week 30-32km/h. on the weekends less traffic and longer stretches 10l... cant complain much... if you want any better than that get LPG or Corolla ;-) and this includes E10, 91RON and 95RON - not much difference in my case... so I am using E10 ;-) curse me hehe

and i have done this little mods to improve etc. i think it would be worth of shot to tamper with the "fuel rich" set up in the ECU but the cost ;-)... is it worth? but the car is great... so when time comes i will be thinking LPG to cut the cost or diesel Skoda Octavia ;-)

The average amount of kms I am getting out of a tank is around 520km. 70% city 30% freeway. Have been using 98ron since I bought the car.

hi Braedz,

i am using either 91RON or E10 - and tried 95RON and it about the same L/km

freeway makes a big difference even small percentage... i have done this week twice trip to play tennis sunday early morning and late evening - hardly any traffic and with E10 for this week 7 days since got E10 i am showing 13.3l...

i am inclining to believe how the ECU is set up... when i have done galant intake - i had instant drop in fuel l/km coz of more air in - then it settled to the same as before, with bottom resonator chopped off just little change... and air sensor cleaned i am back to the same as before i even touched intake...

i really feel that the car set up adjusts itself to the same sort of ratio air/fuel over any physical change... and the only real gain can be achieved from adjusting ECU... well this is my feeling ;-)

Some perspective required here....

We are talking about a car that is extremely cheap to buy, durable, with a fantastic warranty.

It's 3.8 litres and goes pretty damn well compared to Holden and Ford of the same class.


Petrol is the cheapest thing you put in a car.

If you consider that a much smaller car can only save you a few hundred bucks a year, you can be pretty cramped in a Yaris...lol


Fact is a lot of people here are driving a car that would nornally be out of their price range for the level of appointments and low mileage.

Enjoy the free ride...it's all over real soon.

It really does depend on the stop/start stuff. the more of this you do the more fuel you are going to use and there is no getting away from it. It may just be the type of driving that you are doing and not how you are driving the car. If you are not getting 9 or below on a highway trip with steady driving and only one or 2 in the car, then you may have an issue.

got 14s ATM due to heat and running 95 and A/C

usually avg round 10-12 on 98RON sometimes even high 9s and that is stop/start

Some perspective required here....

We are talking about a car that is extremely cheap to buy, durable, with a fantastic warranty.

It's 3.8 litres and goes pretty damn well compared to Holden and Ford of the same class.


Petrol is the cheapest thing you put in a car.

If you consider that a much smaller car can only save you a few hundred bucks a year, you can be pretty cramped in a Yaris...lol


Fact is a lot of people here are driving a car that would nornally be out of their price range for the level of appointments and low mileage.

Enjoy the free ride...it's all over real soon.

So true Blackie

Some perspective required here....

We are talking about a car that is extremely cheap to buy, durable, with a fantastic warranty.

It's 3.8 litres and goes pretty damn well compared to Holden and Ford of the same class.


Petrol is the cheapest thing you put in a car.

If you consider that a much smaller car can only save you a few hundred bucks a year, you can be pretty cramped in a Yaris...lol


Fact is a lot of people here are driving a car that would nornally be out of their price range for the level of appointments and low mileage.

Enjoy the free ride...it's all over real soon.

Mate I agree with you here.

I thought I'd bring the topic up to see how my stock 380 was compared to some with other mods and what would be worth doing. After fitment of a K&N filter alone i have dropped from 14.8L/100kms to 13.0L/100km.
I will definately do the 90mm intake soon for that bit extra but am unsure if it will be worth changing the exhaust?

I would be interested if anyone has done the complete exhaust including extractors (single system) to see if there is any noticeable difference in economy. I know that there was no appreciable difference in the rear straight through. Much better sound and revs better top end. Out to you guys

I would be interested if anyone has done the complete exhaust including extractors (single system) to see if there is any noticeable difference in economy. I know that there was no appreciable difference in the rear straight through. Much better sound and revs better top end. Out to you guys


That would be me.

I have the extractors, rear cat and stock pipe and muffler from cat back.
Performance went up, fuel economy did not go up, trip meter with mixed highway/city on LPG is still 475k's per tank (55L)
But maybe i drive it harder that it breathes better....lol

Blackie - agreed 100%

What I wanted to say is - I'm not complaining not a second

Love my 380 in molten red - just attracting too much attention got some scratches and love the sound when pushed hehe

Consumption is as excpected just wanted to say "dont chase a gost thus is not corolla" and wanted to show with dignity that this car has this real l/km thus not a corolla :-)

That would be me.

I have the extractors, rear cat and stock pipe and muffler from cat back.
Performance went up, fuel economy did not go up, trip meter with mixed highway/city on LPG is still 475k's per tank (55L)
But maybe i drive it harder that it breathes better....lol

I also have extractors, high flow 3rd cat and dual exhausts.

As well as the 90mm intake and a ChipTorque Xede piggyback ECU tuned for 98RON and with the AFRs increased a little from 3,000 rpm onwards and the timing advanced a couple of degrees.

Mine's a manual so hard to compare with an auto.

I'm with Blackie, the sum total of all these mods is a notable increase in power, torque, responsiveness and overall performance, mainly in the mid range to top end (2,500 rpm through to 6,500 rpm), but fuel economy has improved only a little from stock.

I get 9.0 to 10.0 l/100k on a country trip (cruise at 113km/h with the occasional WOT overtaking burst), and 11.5 to 12.5 l/100k in stop start peak hour city driving, again with a bit of WOT now and then to slot into a gap in the traffic.

My ratio of city/country is about 80/20, and overall I get around 12.0 l/100k.

I get 9.0 to 10.0 l/100k on a country trip (cruise at 113km/h with the occasional WOT overtaking burst), and 11.5 to 12.5 l/100k in stop start peak hour city driving, again with a bit of WOT now and then to slot into a gap in the traffic.

My ratio of city/country is about 80/20, and overall I get around 12.0 l/100k.

And the other side of this is mine - without extractors - but an auto, with Exede, with 90% country driving 8.6-9L/100km never get above 10L/100km even when towing a 7X4 trailer.

Theyre great figures Richard. 10 with a trailer. wow

Well, I think not having much city driving makes a big diffference but also having the chip limit how much fuel goes straight down the exhaust really makes the difference.

I was looking at some figures of current cars - petrol diesel. The variations of urban/extra urban in comparison with combined fuel consumption are countless. Combined 10l/100km was anything from 7l/eu 13l/u to 9l/eu 11/u - German cars usually very low on extra urban. Mits even in diesel quite high.