fuel consumtion navara d40

I have done 115,000 kms in mine and have averaged 11.5 over that time. 70% is Freeway driving at 113 kph ( 10.5), 20% towing a 2.5 ton van (between 15 and 20) and 10% 4WD (15-19).
Take it back its not right! Even town driving I get around 12.
Best is 9.5 at 100 kph freeway. Worst is 21 with van, head winds and hills.

Let me guess!!!!

Its an AUTOMATIC.????

Matt

There is alot of D40 concerns to be found at this site

Some of infoSite Link might be relevent to your issue

Regards Don

I find that incredible. I just went back and checked my fuel record for my trip round the block in 2006 in the old D22 STR (2004 3L T/D) and my average for 40,000 km fully loaded and towing an off road camper trailer was 13 litres per 100 km. That covers about 15,000 km of serious dirt such as the Kimberley, Canning, Gunbarrell etc. Your result is amazingly bad. I averaged 10 litres to the hundred for a simliar trip to work over a 2 year period (34 km each way).

Hope you can get it sorted. Cheers. Mick

Mine is a manual so perhaps it's no so relevant to your question but here it is for all it's worth.

Unladen 100kph cruise control 8.5L/100

Towing a 1.6T pop top+ cruise control @95kph = 12.1L/100

Worst figure achieved was towing above van against strong head wind on cruise control in hilly terrain and that was 15.5L/100ks.

Test drove the auto at the time of buying and felt that all the advantages of the torquey diesel went out the window via. the auto trans. Just didn't like it. Drove the manual and bingo!

Car has done 37,000ks without a single problem apart from the dreadful lack of dust proofing in the rear tub (with canopy).

First gear is also a little too high when starting off on hills with the van.

True Blue.

FWIW...

I have heard the 2.5 Nissans have a particulate catalyst in the exhaust...designed to burn up soot etc by getting very hot (like and incinerator). To get very hot the ECM does a burn while driving...ie it over fuels for a period, this raises the EGT and this heat makes the catalyst roast burning up trapped particulate. (now this is a genuine system on new TD but I havent varified this with Nissan and the 2.5 yet, just a valid guess with a bit of speculation thrown in)

Well that the simple theory anyway.

Is the 35km trip all you are doing on a regular basis?

A very speculative guess could be that the distance is insufficient to heat the catalyst during a burn and the over fuelling is just being wasted.

The other guess is the ECM can lose the plot and just goes into burn mode waaaay too often and that is contributing to the high fuel consuption.

Might be worth asking the dealer when you drop it off...I have heard of other people being told that is the reason for their high fuel consumption in the STX. (but again I havent varified it for myself, I hate speculation but it might help you in this case).

Good luck mate

Matt.

Hi Warren,

I have the D40 manual. But as a guide my fuel consumption is poor also.
Open road - 13.5L/100
City - 12.1L/100
Towing - 15+++L /100 on a 1.5 ton trailer

They seem to feel every kg you put into them. I am loaded to GVM day to day with a tool box and tools for those figures.

I am going to remove the tool box as I have a concern about the chassis (complaints corner)on the car and fuel consumption.

good luck

Marco

I have just purchased a 2007 ST-X auto diesel, and drive it around town with the foot flat all the way - hard to make it feel like the Maloo I just down traded to the wife, but the power and torque are pretty good just the same? Economy is not my biggest concern - if you can afford $50k or a ute, don't complain about the fuel? If you want economy, buy a D22, which is smaller, lighter, easier to park, and cheaper to buy??? smaller turbo means smaller fuel burn???

The auto in the d40 is more sophisticated than any auto I have driven before, and in dumb speak, this is going to equate to losses in the gear change process, but it works because it allows the turbo to keep spinning at the right rev to pull hard. Using more fuel???

If you are getting 16l/100 on normal driving (normal means granny driving to church on Sundays) take it back - I get about 13-14 and that is pushing hard around town empty. I have not done a highway check yet, but the difference in our other fleet D40 manual is 9.5 highway versus close to 12 around town, so on that basis I should get between 10-11 on highway???

Alternately, back up the right foot. Do an experiment for yourself - don't let it rev over 2000 rpm for a week and see what the difference is, then you will have something to complain about???

See if you can borrow or buy a scangauge, and that will tell you the actual useage, and also show you where the high useage is coming in?

Again, if you can afford a $50k truck plus the extras, don't complain about the cost of running it? You never hear porche cheyenne drivers complain about the cost of tyres???

Sorry Mr Warren G - Thanks for reminding me that I am a knob and I shall not waste any more of your time?