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Good as Gold Profile
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X-TRAIL NEWBIE
 


Date Registered: 07-2013
TOTAL POSTS: 20
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Please Help avg fuel cosumption 14.5l /100


G-day Guys

I have owned the exy for 5 years it was prodomantly my wifes car but now it is mine.
I average about 14.5l / 100 around town
The best I have ever got was 12l/100 and thqat was highway and being very gentle .
Thes are the mods i have done to help

Headers
High flow cat
complete new exhaust system
K& N filter
Uridium plugs

I have tried all fuel types and there still is not much of an improvement.
I had it dyno tested to find out what was wrong he said it was fine a little lean if anything?
I am running larger tyres but fuel consumption was already terrible

Thease mods helped out tremendously with performance but not noticble with fuel ecconomy.

If I tow the boat on highway it can get as bad as 18/ 100

 So I have to carry jerry incase no fuel station open early hours.
Next is a Tbs.

Any Ideas
Please help

Cheers Phil

---
T 30
K&N Filter
King lift and new struts
Cooper tyres
Iridium plugs
Full Exhaust system upgrade
Roof cage and awning
Cargo draws with 60 lt Arb fridge & slide
Lightforce driving lights
Uhf
Dual battery set up
20/Jul/2013, 10:52 pm Link to this post Send Email PM   Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re:


There is nothing wrong with your car. Increased performance comes at a cost and for a high performance and around town driving, your fuel consumption average is very normal and can not be improved.

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20/Jul/2013, 11:40 pm Link to this post Send Private Message MSN Blog
 
cooch t31 Profile
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X-TRAIL HOLIC
 


Date Registered: 06-2008
Location: Blue Mountains, NSW
TOTAL POSTS: 5966
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Re:


Also depends on what you carry in the Xy, like that fridge and drawer set up would slightly add to the usage for instance.
The biggest factors would be distance traveled, driver habits and terrain.

Hint :-
It would be a good idea to list the type of X Trail you have in your signature so others can compare with their own Xy's.

---
Tony X-891c

HERE is my D22 Navara
HERE is my old 2008 T31, ST Series1

21/Jul/2013, 6:29 am Link to this post Send Private Message
 
Good as Gold Profile
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X-TRAIL NEWBIE
 


Date Registered: 07-2013
TOTAL POSTS: 20
Reply | QUOTE
Re: Please Help avg fuel cosumption 14.5l /100


G-day
I understand what you guys have said but this was the same even before all mods (standard)


Just comparing mine to other owners I dont seem to be close.
Around town 14.5
Highway 13.5
Highway towing 18.5

Now with all mods and weight I will recalculate, this will be with 98 ron and mixed highway and around town.

Cheers
Phil

03 T30



---
T 30
K&N Filter
King lift and new struts
Cooper tyres
Iridium plugs
Full Exhaust system upgrade
Roof cage and awning
Cargo draws with 60 lt Arb fridge & slide
Lightforce driving lights
Uhf
Dual battery set up
21/Jul/2013, 10:25 am Link to this post Send Email PM   Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
Reply | QUOTE
Re:


You should consider changing the CAM and Crank sensors which also contribute to poor fuel economy when they are on their way out. They just stop working sometimes due to age.

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21/Jul/2013, 10:51 am Link to this post Send Private Message MSN Blog
 
Sxytrail Profile
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X-TRAIL NEWBIE
 


Date Registered: 07-2013
Location: Adelaide
TOTAL POSTS: 56
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Re: Please Help avg fuel cosumption 14.5l /100


It would be more likely to be a bad oxygen sensor in the exhaust or a vacuum leak or possibly fuel pressure regulator. I would get it onto another dyno because if the operator says it is ok maybe a bit lean doesnt make sense compared to the fuel economy, did he check both light cruise afr's and power run afr's ?

---
Daily : 2012 T31 series V, 2.5l, manual X-trail.
Genuine side steps, thats all for now...
Weekend fun car : 2002 S15 200SX / Silvia GT spec R with plenty of mods.
21/Jul/2013, 5:18 pm Link to this post Send Email PM   Send Private Message Blog
 
Good as Gold Profile
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X-TRAIL NEWBIE
 


Date Registered: 07-2013
TOTAL POSTS: 20
Reply | QUOTE
Re:


He said that sensors were ok but not sure what else he tested . A couple of years ago a had the cam sensor replaced.


---
T 30
K&N Filter
King lift and new struts
Cooper tyres
Iridium plugs
Full Exhaust system upgrade
Roof cage and awning
Cargo draws with 60 lt Arb fridge & slide
Lightforce driving lights
Uhf
Dual battery set up
21/Jul/2013, 6:46 pm Link to this post Send Email PM   Send Private Message Blog
 
DJR9000 Profile
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X-TRAIL ENTHUSIAST
 


Date Registered: 08-2012
Location: Blue Mountains NSW
TOTAL POSTS: 169
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Re:


I know my economy improved by about 15-20% after having my cylinder head rebuilt and O2 sensor replaced at 155,000 Kms. If yours is old and has the original O2 sensor then give that a go

---
Ben
Hazelbrook, Blue Mountains NSW
2002 T30 Ti Dark Blue Mica
21/Jul/2013, 9:20 pm Link to this post Send Email PM   Send Private Message Blog
 
DogTrail Profile
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X-TRAIL FANATIC
 


Date Registered: 05-2012
Location: Sunshine Coast
TOTAL POSTS: 481
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Re: Re:


The simplest way to improve fuel consumption in the X-Trail is to modify the sensor directly connected to the right foot.

The brain.

Note: if you are light of foot on the accelerator, then it must be something else which causes the untoward thirst for fuel.

The car does what it is told to do by that right foot.

I've found there is a sweet spot where the cars Artificial Intelligence (which is as dumb as dog poo) does respond willingly and effectively if asked properly.

Accordingly, with a 2.5 litre 4wd it has returned for me an average of 8.6 l/100 km over the lifespan of the car. See Spritmonitor.

There are many diesels which do not achieve that but it is all down to the driver, not the car.

The X-Trail likes to open the throats and suck fuel the moment it is asked. That blows the averages the moment one floors the accelerator but it is a wasted exercise. You will attain the same speed at the same time by giving the car "enough", rather than 'too much'.

Note: I don't like any of the oil companies but decades of experience has led me to believe that BP, Caltex and Mobil have not harmed my cars. I cannot say the same about Shell.
 
So I prefer to use those fuels in that order.

For the 'run in ' debate, I drove it as normal but purposely ran it up and down the ranges with hill climbs and highway mixed with Urban driving for the first 3000 Km.

That seems to have worked with this motor as it has used no oil between services and continually beggars belief with its frugality on fuel.

However, your situation is opposite: The car has been 'worked' but sucks juice. Perhaps an Italian Tuneup would help in your situation?

This next part is also posted in Engine Mechanical sections reply to another question (soot) but the suggested remedy is the same.

"An 'Italian Tuneup" consists of flogging it up and down a hill (work on 4000 to 6000 RPM uphill over at least 10 minutes up hill) [with a warmed up transmission and engine - say 20 KM of previous warm up] followed by a downhill back-pressure run not exceeding 5,000 rpm and a quick blatt up the highway at 100kph for as long as is easy for you, combined with a tank full of BP 98 ultimate might make the world of difference to a motor."

Run BP 98 for at least 3 full tanks for a proper cleanup.

This slightly detuned (compared to the rest) Italian Tuneup is much cheaper than the other options and might even work.

Last edited by DogTrail, 22/Jul/2013, 1:36 am


---
2011/12 Australia:- 2.5 litre petrol 4WD, Series IV ST, CVT : + some gadgets and cosmetic add-on's. Dirt, (it protects the paintwork) X-2429(c).
21/Jul/2013, 11:08 pm Link to this post Send Email PM   Send Private Message
 
mfeodoroff Profile
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X-TRAIL FANATIC
 


Date Registered: 09-2012
Location: Brisbane
TOTAL POSTS: 309
Reply | QUOTE
Re:


I'd be guessing at a sensor, presuming you'be been given the injectors a regular clean. I use Nulon Total Fuel System Cleaner every 5,000kms to clean the system. At the moment its at $25 (less 20% until July 31 for RACQ/NRMA/etc members) at Repco and $23.50 at Supercheap.

Cheers,
Mark

---
Mark (X-2639)
2011 ST Series IV 4x4 with CVT in Precision Grey
Cooper CS5s, Tinting, Towbar, Bonnet Protector.
Mods: Steering Wheel Lights, Bash Plates, DBA Slotted Rotors


22/Jul/2013, 7:24 pm Link to this post Send Email PM   Send Private Message Blog
 


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