Since ive bought my 380 VRX, the car only does a 5 minute trip in the morning & afternoon....... its pretty much still cold by the time i get home. The trip meter reads an even 15L per 100km's.

Id like to know what others are getting with decent trips around town, and even on the highway.

Long term, with about 1/2 city peak hour traffic, 1/4 city 'light' traffic, and 1/4 highway/freeway cruising at 110km/h (with the odd burst of WOT overtaking), I am averaging 12.4 l/100k. That's over the last 4,000k approx, haven't reset it in a while. It's the stop go peak hour traffic that really kills my fuel economy, at a constant 110 km/h on a flat road with no or light winds the instant read out is 9.2/100k. Also, that's in a manual with the over-short 4.111 to 1 final drive ratio, so I'm doing 2,850 rpm at 110 km/h in 5th gear (true 110, indicated 116).

yeah i dunno whats going on, the car drives like its brand new........ i honestly drive like a granny everywhere, but these short trips when cold are killing my fuel economy

its gone from full tank to 1/2 and ive only done 200km's.

i may as well have kept my 2000 model V8 which i only sold because i thought it was thirsty

I just lost my fuel usage stats (was on a phone that died) but from memory, over a year and a halfs usage - average fuel was 12.15 L/100kms highest was about 16 which would have been a few tanks of exclusivly four km trip to work and back in traffic both ways. Best tank i ever recorded was 8.8 l/100kms which was nearly exclusively highway. in the city i feel that ive been a grandpa if i get more than 520 kms out of a tank.

yeah i dunno whats going on, the car drives like its brand new........ i honestly drive like a granny everywhere, but these short trips when cold are killing my fuel economy

its gone from full tank to 1/2 and ive only done 200km's.

i may as well have kept my 2000 model V8 which i only sold because i thought it was thirsty

Yep, I find the cold start economy is apalling. I think the stock ECU is programmed to pour masses of fuel in when cold as a cold start 'protection' feature. But even though the idle soon drops to normal (around 550rpm) it still seems to run very rich for a while longer.

I am averaging around 10-11.5l/100kms. Still would like better was at 9.1 for a country trip!

8.3 hwy DUBBO TO MILDURA , 4 ADULTS AND A BOOT FULL OF LUGGAGE

yeah i dunno whats going on, the car drives like its brand new........ i honestly drive like a granny everywhere, but these short trips when cold are killing my fuel economy

its gone from full tank to 1/2 and ive only done 200km's.

i may as well have kept my 2000 model V8 which i only sold because i thought it was thirsty


I'm glad I wasnt the only one. I got rid of my 02 ss v8 with short trips returning 21 but highway trips under 10.
I currently show 14 on short trips but 9 ish on highway.

You guys should get some extractors and release that power! Fuel economy should be way better.

extractors dont change fuel economy, in my experience at least.

Averaging in the mid to high 9s. Haven't had a single tank in the double digits yet :)

Majority highway/freeway driving will do that though...

Not sure what difference my significantly smaller tyres will do to impact on reported fuel economy either.

Id assume the resistance per revolution of the wheels would be lower and the number of kms travelled being reported as higher than is actually the case so id guess that the figures are probably a little flattering :P
however if you are just going off the trip computer then that overestimates fuel usage so the two might cancel out?

I dont wanna post mine. >.< Im at 14.5 but thats with noooo highway driving pretty much what so ever. Mostly to work/gym/beach which is all starting and stopping.

I dont wanna post mine. >.< Im at 14.5 but thats with noooo highway driving pretty much what so ever. Mostly to work/gym/beach which is all starting and stopping.

theyre pretty thirsty these things !!

I had a VCT 6cyl Fairmont Ghia which at 13.5L around town i considered that thirsty...... and a V8 windsor fairmont ghia with around 15-16L around town which was shocking. Ive got a big highway trip coming up, if it doesnt stay in the 9's the car will be up for sale when i get back. :P

Mines sitting mid 14's also. Lots of traffic driving with the occasional squirt and a faulty O2 sensor, which I think is affecting fuel economy as I'm not seeing below 9's on the open road where usually it would be less...

I'm getting around 13 with no highway, around suburb mainly. Used to get even worst around 14-15 but improve after changing to quality 5w30 engine oil instead of 15w40 that i used previously. on LPG it's getting around 16

did a scan on the OBDII port hoping to see an oxy sensor fault, but only got U1110 which from a google search shows "A/C - ECU CAN Time out ........... wiring/ A/C module, ECM"

aircon works fine so not worried, also heard someone else got a similar code found after a recent service with no bad effects.

I sit comfortably on mid 12s. 95% suburban. but in saying that, its a pretty straight forward drive with no traffic lights. settling in for a highway drive I see my instant fuel at around 7-8/100.

I can't complain. I can get through a fortnight on a tank. which is all that I really care about.

averaging 10 -11 per 100km. mix of city and open road {no motorway }. calculated not using the computer. was 9-10 before i put the new 18s and 235 tyres but the handling improvement is worth it. usually in the 8-9 on motorway . i normally let it idle for a couple of minutes first and this does help the economy .

i normally let it idle for a couple of minutes first and this does help the economy .

Forgot to mention this, mine idles between 15-20 mins of a morning warming up which doesn't help my case either lol

15 minute warm up, damn !!

are you talking about the 380, or a Datsun 120Y lol

Urban ddriving i ave 13s. All hway 8.5 (at least that was bris to syd pulp 98ron just serviced, new k&n). Most other times its somewhere in between.

well i figured, the car has copped a new timing belt, filter, spark plugs, oil and a new owner with different driving habits........ so disconnected the battery a couple hours, and warmed the car up and even though ive only done a handful of km's now the avg fuel reads 12L/100km which im quite happy about.

i'll see how it avg's out over longer distance

We are in the 10's and 11's in Canberra usually. Not sure when you should change the O2 sensors on these cars running stock ECU settings. I know changing them will give better economy but there are a few of them!

We are in the 10's and 11's in Canberra usually. Not sure when you should change the O2 sensors on these cars running stock ECU settings. I know changing them will give better economy but there are a few of them!

10's and 11's is pretty good, doubtful you would get any improvement by putting new O2 sensors in.
O2 sensors are a 'wear and tear replace at some stage' item, but how long they last on a 380 seems to be all over the shop.
I've seen/heard reports of them conking out at less than 100,000k, in other cases they seem to last well over 200,000k.
Seeing as there are four of them on a 380 and the 'plug & play' OEM versions are not cheap, I wouldn't go replacing any until you are sure they are cactus.
And even then figuring out which one is cactus is not that simple. You can check OBD2 error codes but often they will only narrow it down to front or rear bank and won't tell you whether it's the pre-cat or post-cat sensor. A dealer MUT3 could maybe tell which one(s).

What are the symtoms of sensor failure?

well did 1000km trip, and im really happy with how well the car drives

sitting between 105-110 not much overtaking the car sat firm on 8.2L/100km, thats fully packed with family and luggage. When it came time to fill the car, the figures are actually a bit better again. 7's driving sensibly on the highway wouldnt be a far stretch

What are the symtoms of sensor failure?

CEL like me. Mine comes on and stays on for about 1500k's then turns off for a while before re appearing....

Im getting 14.5L, since I got the car 20months ago. Best was like 8.9L from launnie-hobart.

In Newcastle driving I can pull about 13.8 L/100km doing ten minute drives to work and back during the week followed by some start-stop foreshore cruising, but on the highway like on my recent trip to QLD I was doing about 8.9 L/100km and full tank range was about 720km

Averaging 11.4l per 100km. 90% urban driving in Adelaide. Recently had my exhaust changed, and I also run on 98 octane exclusively.

Averaging 11.4l per 100km. 90% urban driving in Adelaide. Recently had my exhaust changed, and I also run on 98 octane exclusively.

Hey Braedz, I can't see anywhere where you've told us what you had done to your exhaust. Interested coz I know you were running a Berklee BS0655, seeing as it was my old one!

11.4l/100k sounds pretty good for 90% urban driving, maybe Grandpa driving style!

Hey Braedz, I can't see anywhere where you've told us what you had done to your exhaust. Interested coz I know you were running a Berklee BS0655, seeing as it was my old one!

11.4l/100k sounds pretty good for 90% urban driving, maybe Grandpa driving style!

I don't have the model, but it definately is not a berklee. It is a straight through exhaust, but a fair bit quieter. I am surprised about the fuel economy, car has been running a lot smoother since changing the muffler. Plus I don't exactly baby it lol.

I go nice and easy on mine due to most of it being peak traffic, and it tends to stay in the mid 12's.
For those who know Adelaide, the run is Goodwood Rd > Ayliffes > South > Sth Expressway > Panalatinga so a fair mix from 50-100kph but Goodwood Rd is a carpark in peak.

Mostly drive the work van now though. 380 has been relegated to weekend runs.

Goodwood Rd can be atrocious at peak time, as can South Rd south of Castle Plaza. The government is all talk about a non-stop north-south corridor, but realistically the only option south of Cross Rd to the Aysliffe Rd/South Rd intersection is a tunnel, something which will never be done. Instead they are tackling the easy parts, such as the north end of South Rd with the 3km superway. That was the easiest part of South Rd to work on, and was probably the best part of it too! Of course then there's the duplication of the southern expressway. It's good, but it won't massively improve traffic flow since traffic flows mostly in one direction depending on the time of day. Since they aren't doing the Darlington exchange now, and putting traffic lights there instead (which will affect the north/south path as well) it could potentially be worse.

Anyways, I mention that because the old Mitsubishi factory is right on that path. Also, fuel economy would suffer in any car at peak hour. I think it's a shame though that Mitsubishi decided to make a 'bigger' Galant rather than a sligthly smaller one (making it midsize). Also there were other better engine choices they could have had. They may be still made if they were a mid size option...

Someone I know with a 380 gets around 12.4L in the city and around 9L on the highway.

Since ive bought my 380 VRX, the car only does a 5 minute trip in the morning & afternoon....... its pretty much still cold by the time i get home. The trip meter reads an even 15L per 100km's.

Id like to know what others are getting with decent trips around town, and even on the highway.

Hi guys, I have a 2006 380 LS and currently average 10.3L/100km around town. On the freeway goes down to 9.5L/100km. However, it may be the way I drive. Although the car is powerful I tend not to drop the acelerator much.

however if you are just going off the trip computer then that overestimates fuel usage so the two might cancel out?
I think they do actually!

My trip meter for the last 24 hours indicates an average fuel usage of 9.3l/100km.

I fueled up last night, and fueled up again tonight. I checked the distance travelled via Google Maps - approximately 270km travelled (+/- 5km). I put 25l of fuel in tonight. Works out to be 9.3l/100km!

That's 70% 100-110km/h freeway and the rest as varying degrees of urban driving. I was travelling a little slower on the highway because it was raining, but the urban commute was also much slower than usual.

Since purchasing my 2007 Series III ES I have done 16864 Klms. Using ULP, E10, 95 and one part tank of 100. I have settled on using 95 Vortex now.
Most of this driving is rural, about 5% city. City driving is mainly Canberra with some Melbourne and Sydney.

I have used 1666.09 Ltrs for 10.12 Klm per litr or 9.88 ltrs per 100 klms. Most of the time I am feather light, with the occasional hoon mode kicking in (very rare).

well since doing an ECU reset after the 90k service along with berklee muffler mod, the trip meter has dived from an even 15L to an even 14L per 100km strictly around town. These cars seem to respond well to simple changes.......... cant wait to see how the larger snorkel helps things.