Fuel Economy

[Tanga]

Full to Empty 377km on 98

Just filled to the brim, $123 of 98 Octane

[wintertidenz]

That's shocking. Was it round town driving?

[Tanga]

That's shocking. Was it round town driving?

Yea bro, to and from work, bitta boosting, bitta slow driving

[Bender]

I done just under 380kms to a tank, Over half of my driving is on a country road, Been trying to driving nicely and staying off boost as much I can with having it good boot now and then.

$112 to full just over 52 liters of 95 octane

[SEAN-NZ]

i got 8.9k to the litre, with 80% of that coming back from auckland, although i might, or might not have been speeding almost the entire way back

[Badger_01]

Still better than me, I'm getting less than 300km a tank on 95, fully up every 2nd week lol

[WOODY72]

Last fill up 50.1lit to 190miles = 17.236mpg

[Adam.Findlay]

Still better than me, I'm getting less than 300km a tank on 95, fully up every 2nd week lol

300 to a tank! f**k me! are you towing a huge boat around everywhere you go?

I only get that kind of shocking fuel economy when I was giving it alot a right foot.

usually get between 400 and 450km to a tank with around town driving, bit of motorway stuff occasionally. and that was after I put my cams in which im sure didnt help economy

[VR457]

I noticed my fuel economy went up when i stopped downshifting on the autobox.

[ako]

Jeeeesus thats some horrific gas use - like "is something not working right" type shocking

Are you driving it solely foot-flat or from cold starts and thats it?

I remember one of my 7G's did similar when the 02 sensor died a death by avgas

[97vr4]

I get 420km per 55L of fuel
Gas light comes on with 15L in tank lol
If i get into boost and play with the car a bit i get about 340km to 55L
I also run 16ish psi
$78 for 55L of Sunoco 94

[Subaru ETA]

Still better than me, I'm getting less than 300km a tank on 95, fully up every 2nd week lol

Are you running a VTA BOV?

[Kenneth]

I get pretty good economy, in my experience the following is a good path to follow.

The things I would check
1) Driving style. Don't let the intake pressure get out of the -21inHg -10inHg range (requires accelerating VERY slowly) and see how you go. If you get 550+ out of a tank, its not really worth persuing the rest of the list :P
2) O2 sensor
3) Boost leak test
4) Make sure you are not getting excessive knock (i.e. running 14+ psi on standard intercooler will put you on low octane maps)
5) Get injectors cleaned (or new ones, I got ID1000s)
6) Get a tune

[wintertidenz]

You forgot one important thing between 1 and 2 :P check your spark plugs are good. These make a HUGE difference to economy.

[Badger_01]

300 to a tank! f**k me! are you towing a huge boat around everywhere you go?

I only get that kind of shocking fuel economy when I was giving it alot a right foot.

usually get between 400 and 450km to a tank with around town driving, bit of motorway stuff occasionally. and that was after I put my cams in which im sure didnt help economy

Yeah I have no idea, fuel economy is better since I replaced the fuel filter hahahaha


Are you running a VTA BOV?

Nope its a recirc one, looks like a knock off GFB one.

I need new plugs but I cant find anywhere that sells BKR7IEX, was going to replace the O2 sensor when I get an AFR gauge and sensor. Def need a tune/remap but pretty sure theres no one up here that could do it, still have a few things to put on the car like fpr, large bore fuel rail adaptor, walbro fuel pump, ebc

[Kenneth]

Yeah, thats true. And also running high boost with standard ones probably won't help keep detonation at bay.


You forgot one important thing between 1 and 2 :P check your spark plugs are good. These make a HUGE difference to economy.

[wintertidenz]

I need new plugs but I cant find anywhere that sells BKR7IEX


STA Parts in Auckland sell them - they're about $20 a piece plus shipping. Super Cheap may also sell them for less.

[Badger_01]

STA Parts in Auckland sell them - they're about $20 a piece plus shipping. Super Cheap may also sell them for less.

STA don't have any in stock and whenever I ask them when they are going to get them in stock they give me the run around and go on about the ones gapped to 1.1mm. Three times that has happened, so f**k them lol

[wintertidenz]

PM me - if you can't get any down the line then I could get some and courier them down.

[Badger_01]

PM me - if you can't get any down the line then I could get some and courier them down.

Cool cheers for that :)

[Oggie]

I can get around 450km out of a full tank around town.. aint taken it long distance yet...

BUT I know for a fact that... I can get from porirua to over the rumitaka's to masterton and that's some nana driving right there for about 20 dollars in petrol. about 91 km one way.

[dixon8]

hi guys, just done a longish drive this weekend to napier from wellington via Manfield . I did 452.7km on almost a tank full (47.25l) , as the fuel light had just started to come on.

to my calcs this is about 9.58km/l or 10.4l per 100km (or 27.1mpg old school)

thought I might have got a few more km/l with a 5 speed manual and not speeding much - cruising about 104km/hr this weekend :(

[Tanga]

Wow, this post took off haha.

I went Auckland to Whangarei this weekend return, was full tank when I left, had 1/4 left when I got back - 320kms, $80 of 98 Octane @ $2.26/L

As to km/l - Dunno lol

Def think I need to look at o2 sensor

Random Q;
Boost gauge - Mechanical or elec better?

[Bender]

From Tauranga to Gisborne with driving around I done 420kms on the tank and fuel light wasn't on, She took 41.46 litres to full with the drive back I done just under 300kms with just under 1/4 tank left.

[dixon8]

forgot to say that I'm running with mobil 95.

useage checked by refilling to same level ( when I see the fuel sitting just at nozzle depth, I stop) before and after travelling kms.

saying 1/4 tank left not accurate sorry, as gauge drops real quick after half tank :(

[SEAN-NZ]

il try figure out my usage again when i go back to auckland wednesday or thursday, and when i come back
64979





Random Q;
Boost gauge - Mechanical or elec better?

apparently mechanical have better response, unless you want features like memory, i dont see the need to electric, i assume mechanical are easier to install

[Tanga]

apparently mechanical have better response, unless you want features like memory, i dont see the need to electric, i assume mechanical are easier to install

Yea this is what im reading, I found open boost and I dont think my gauge was keeping up haha

https://www.facebook.com/photo.php?v=10151768881438237&set=vb.529713236&type=2&theater

[wintertidenz]

Electronic gauges use less vacuum piping so theoretically less lag. And there's not the worry of a pipe coming into the cabin that can get damaged, pop off or leak.

[Myke]

I hate the lot of you, i went from Auckland to levin and back this long weekend filled up in Auckland got to Taupo about 307km and had 1/4 tank left filled up again and made it to levin with about 1/4 left so about 1.5 tanks worth of gas just to get their and the same back, 1200km and around $320 on gas. FML haha

[wintertidenz]

Yikes something is definitely not right with your car. I was able to get to Taupo from BP Drury (about 290km) on 25ish litres of 98, and that's including boosting and two passengers with a sub box.

[Bender]

I hate the lot of you, i went from Auckland to levin and back this long weekend filled up in Auckland got to Taupo about 307km and had 1/4 tank left filled up again and made it to levin with about 1/4 left so about 1.5 tanks worth of gas just to get their and the same back, 1200km and around $320 on gas. FML haha

Hahaha and I thought mine was bad on fuel...

[SEAN-NZ]

I hate the lot of you, i went from Auckland to levin and back this long weekend filled up in Auckland got to Taupo about 307km and had 1/4 tank left filled up again and made it to levin with about 1/4 left so about 1.5 tanks worth of gas just to get their and the same back, 1200km and around $320 on gas. FML haha

$320 at what i pay for 98, 2.289 at the moment i think, 140 litres, 8.5k/l not bad, i think i got less than that doing a few ks rounds tga then heading to auckland and doing a bit of driving there

[Tanga]

I hate the lot of you, i went from Auckland to levin and back this long weekend filled up in Auckland got to Taupo about 307km and had 1/4 tank left filled up again and made it to levin with about 1/4 left so about 1.5 tanks worth of gas just to get their and the same back, 1200km and around $320 on gas. FML haha

I just filled up and had done 320km to full tank - 400 is a stretch for me, so 300 on 1200km would be around what i would get

[Oggie]

I find that when I top up with gas... I always work at 10km per litre of gas. yesterday put in some 22l of gas. I should make an easy 220km from that around town. more if I long distance it. but not that much more..

last time I did a long drive was owera to wellington..
tank and a third I think it was.. and that was with a hitch hiker from taupo. of and the hose from the bov came loose in aucks but I never noticed till someone pointed it out. not sure if that ever made a difference or not.

roll on may 2014 I wanna goto the dark side they have rwd and pizza's and lotsa V :)

[Bender]

When I full up the other day, I had done 380kms to a the tank and was just on 53 litres to full

I do know my plugs need doing, Not running 100% right at the moment...

[ako]

Jesus

Got me rethinking if I want another VR4 now!

My last legacy (2L B4 shape) got a consistent 600km plus from a full tank (50l to light on) on the open road - even my auto/turbo airtrek got better economy than what you guys are reporting :S

[wintertidenz]

Once the cars are retuned they are fine, or if you're on the open road with gentle acceleration. I've gotten 560km to 50ish litres in a single trip round the Coromandel before with a full car load.

[Badger_01]

I desperately need my car tuned/retuned. Like I dont go anywhere besides work and getting less than 300kms a tank, so fulling up every 2nd week, pretty much pay day and boom $100-120 gone straight away just on fuel :(

[Bender]

Or maybe we all just have to heavy of a right foot???

[wintertidenz]

Round town + heavy foot = petrol gone really quick.

Get a wideband and readjust the narrowband emulation slightly and you might find an improvement. Again, fresh plugs and filters will make a big difference, as will checking for and fixing boost leaks.

[Adam.Findlay]

plus if you get a wideband and adjusting the narrowband enulation does not do the job you can always adjust the MAF screw to lean it out. I did that, and when I finally got access to an openport 2.0 cable to reflash the fuel maps I didnt have to change bugger all of the fuel map because the MAF screw mod had got the AFR's almost bang on. made it drink a bit less gas.

but seriously guys you must have heavy feet. I have a bloody heavy foot I must admit and I still can get ~450 to a tank without having to be too careful.

[SEAN-NZ]

i somehow managed to get an average of 9.5km/L, filled it up in tauranga, headed to auckland, over 200k trip, cant remember now, then did some driving around, did a total of 453k before filling up to come home, i tried to be light on the throttle on the way up and around town, clearly made a difference, would have wasted that entire fuel saving coming back though haha

[Badger_01]

I use more fuel than what I did when the car was an auto hahaha.

So messed up. I don't really give it sh*t much anymore, I still need to change my plugs and do a boost leak test. Hard when working cause I cant be f**king bothered to do anything during the weekend haha.

PLus can't really do anything this weekend as working doing the V 4s and Rotary show :)

[Bender]

I have try to be light on the throttle and stay off boost as much as I can, Can get around 350-360kms tank this this around town, Get around 150kms from the first 1/4 of the tank but next 3/4 of the tank seem to go down really fast and doesn't seem to matter how your drive it.

I know my plug ect ect need doing.

[Badger_01]

Ordered some spark plugs through work, less than $15 each :)

So whenever I change I shall see how much this helps

[dixon8]

Ordered some spark plugs through work, less than $15 each :)

So whenever I change I shall see how much this helps

that sounds awfully cheap, cost me about $20 + gst recently for irdium long life ones from BNT

[low_vr4]

Yeah I have no idea, fuel economy is better since I replaced the fuel filter hahahaha



Nope its a recirc one, looks like a knock off GFB one.

I need new plugs but I cant find anywhere that sells BKR7IEX, was going to replace the O2 sensor when I get an AFR gauge and sensor. Def need a tune/remap but pretty sure theres no one up here that could do it, still have a few things to put on the car like fpr, large bore fuel rail adaptor, walbro fuel pump, ebc

Maybe get a decent recirc bov? There is a guy on ozvr4 forums who sells evo 8 mr metal bov's for $150 aus. They are awesome.

[Badger_01]

Maybe get a decent recirc bov? There is a guy on ozvr4 forums who sells evo 8 mr metal bov's for $150 aus. They are awesome.

Could be possible that it may be failing but I dunno, car has only been drinking fuel like there is no tomorrow since I've been using the sh*tty 95 fuel

[babasvr4]

Damm, bugger, poo!
Plugs, check! Fuel filter, oxygen sensor check! Oh its pissing me off, down to 250 kms per tank! Not enjoying the drive now, no WOT, no boost...life as I know it is ending!

[Badger_01]

Damm, bugger, poo!
Plugs, check! Fuel filter, oxygen sensor check! Oh its pissing me off, down to 250 kms per tank! Not enjoying the drive now, no WOT, no boost...life as I know it is ending!

Wow thats worse than what I get haha

[Bender]

My fuel economy is worst now since doing the plugs, new fuel filter, new k&n panel filter along with injector cleaner now doing around 320kms to a tank, Know my blow of valve leaks abit but finally found a EVO 8 blow of valve and taking it in for dyno check next Tuesday and see if that found anything wrong.

[wintertidenz]

Check the coil packs aren't sparking out. That makes a huge difference, along with leak testing the pipework.

[babasvr4]

Wow thats worse than what I get haha






Wah, you hates me!!!

[babasvr4]

Check the coil packs aren't sparking out. That makes a huge difference, along with leak testing the pipework.




Is there some visual indication of "sparking out", haven't heard of this term before. Will double check the pipes but not holding much hope there.

[wintertidenz]

Spray them with a squirty bottle while the car is idling. You will hear/see it.

[babasvr4]

Ok right, bridging to earth/ground...Cheers for that!

[Sikvtr]

I got a fuel tracker app on phone an im getting bout 14l per 100k. pretty ****e really, is fairly standard an is triptronic
gunna get trans flushed as that may help a little and check over it all when cambelt is done. maybe aftermarket ecu with tune?
sad when my wrx running 16psi with external etc was getting better economy lol so much for subys bein the most expensive in gas

[Ryan]

9.7L / 100km (combined cycle) is my best so far.

[babasvr4]

Well my best ever fuel usage is now 13.3 litres per 100km! Sure it's not famous but a long way down from
a high of 20 and average of 16.
The only attributable change is a new EVO metal BOV, I doubt the new intercooler would help.
Must have been suffering boost leak.

[Oggie]

Damm, bugger, poo!
Plugs, check! Fuel filter, oxygen sensor check! Oh its pissing me off, down to 250 kms per tank! Not enjoying the drive now, no WOT, no boost...life as I know it is ending!

thanks for making my 13b look cheap :)

[babasvr4]

You said it, not me!
It's a small.price for so much performance.

[crazyken76]

Im getting on short journeys about 240 miles on a full tank

[Chris.W]

On a non stop run i get around 270 mile to a full tank ( filled up the spout).
Having said that, the worst i have gotten with the car in it's current setup was at the ring where i managed 2.6mpg!!
Was fun tho :-)

[babasvr4]

That's some 430 kms! Gone as far as 300 kms, topped up with 40 litres. Assuming I had 20 litres left may have hit 400...don't trust my fuel sender as it bounces up and down after the half way mark.

[Badger_01]

Heh Im still getting only 300kms out of my tank. Really annoying since petrol costs so bloody much

[Dannyb]

I live up a very windy and hilly road out of my town. That uses alot of fuel on braking, accelerating over and over. Good fun to drive at times but like I said, alot of fuel. My fuel guage is also up and down all the time so I don't know what to believe at times haha:confused:. My car doesn't sound like the worst though . These care are terrible with fuel but really nice to drive :thumbup:

[wintertidenz]

Sounds like you guys need to do some fault finding. I get 450ish km city still, and can get to Taupo on just under half a tank.

[Bender]

Few weeks back I fill mine up in Matamata, went off to Auckland, Albany North Shore back to Tauranga and fuel light come on as I was coming up my road and had done less then 450kms on the full tank, Mine seem to get worst each week, Full up last week and used half of tank in about 140kms... Something is wrong....

[kiwigalant]

Few weeks back I fill mine up in Matamata, went off to Auckland, Albany North Shore back to Tauranga and fuel light come on as I was coming up my road and had done less then 450kms on the full tank, Mine seem to get worst each week, Full up last week and used half of tank in about 140kms... Something is wrong....

You forgot to mention the fast and the furious driving on the motorway following your mate in his legnum lol.

It cost me $40 to go from Matamata to Hamilton and back. Somewhere around 140km, passing a few times either way but reasonable driving.

[Bender]

You forgot to mention the fast and the furious driving on the motorway following your mate in his legnum lol.

Oh yeah lol forgot about that, That use up good ¼ of the tank

[low_vr4]

My fuel economy has gone from bad to worse, think I'll get spark plugs and O2 done

[Oggie]

You forgot to mention the fast and the furious driving on the motorway following your mate in his legnum lol.

It cost me $40 to go from Matamata to Hamilton and back. Somewhere around 140km, passing a few times either way but reasonable driving.

at one stage I was getting less than 40km per quarter of a tank.. all because cel and water in the electrics... fixed it self after a week.. and I then desconned the battery... to make sure it was good as gold.. now getting 400km a tank now local driving..

[low_vr4]

I'm getting about 40kms per quarter as well

[Badger_01]

I got 230km to half a tank, then the other half just disappeared :(

[wintertidenz]

Check leads and coil packs as well. If those are arcing out you will find a massive drop in economy.

[kares_leni]

hi all I did trip to donington park last week and I have done 9.5litres per 100 km this is out town driving but the car it is not standard I am on the end of td 04 project I just need to fit new injectors an remmap the ECU which will be soon, any way as soon as put td04 turbos I felt difference about economy I think that is because of the turbo spool starts later than the stock ones it is spools after 4k if you drive up to 4k the economy is very good (with stock injectors) I don,t know after the new ones but I think will be not much big difference. my upgrades so far fuel pump wallboro,evo 8 intercooler,evo8 clutch with lighter flywheel,FPR,magnessor cables ,cooler box for the air filter ,spark plugs,oil temp and pressure sensors with gauges,of course two td04 turbos+ kunigava aqtuators ,2.5 into 3inches exhaust ,custom exhaust manifolds to fix the turbos on,boos controller greedy. NEEDS to fix bigger injectors and o2 sensor and remmap