What economy are people getting from their MN's

[thebaton]

I have a 2009 MN 2.5 with 250,000km on the clock. It is a GLX-R super select 5 speed Auto.
Had it since 220,000km and it came with a 125litre long range tank, canopy with roof bars and all else standard.
It now has 250,000km on the clock.

It would use 11-12 litres per 100 km on my commute which involves ups and downs, loads of traffic lights, and one steep decently long hill in an 80km zone. FYI i dont speed and would get 9.5 litres per 100km in the manual D22 Navara i had previously.

I have since modified it - roof bars on cab with an LED light bar at the front, spots on the nudge bar, CB antenna on nudge bar, side mounted awning, larger tyres - original tyres were 245/65/R17 and the new tyres are 265/70/R17. I also fitted a Dakota Digital MFKSGI-5E to keep the odometer standard, AXT 11 turbo, turbo/intercooler piping, lots of kilos of sound dampening (stripped out the interior and did every inch but the roof) , catch can, DLC injectors, PWR radiator, cross country intercooler and LPG injection. It has also been remapped for economy to 105.2Kw at the wheels and 450nm of 'derived' torque (whatever that means). The tuning and injectors also quietened down the engine. (I also put in 4 guages and 1 dual gauge to monitor engine oil temp/pressure, gearbox oil temp/pressure, boost and EGT, and a fumoto oil sump drain valve but they shouldnt make a slight difference to economy).

The LPG is relatively new and requires tuning down on its first service (it should be at about 15% of total fuel use i believe but its around 26%). I`m using 9.1litres of diesel and 3 litres of LPG per 100km. Will report on if this improves after the LPG tuning - hopefully the diesel use doesnt increase too much as the LPG use decreases!!!

It does run like a different vehicle now, it was a frustrating drive before. It will get fantastic economy at 60km an hour and the fuel use increases gradually up to about 90km an hour where it starts to drop off a cliff unfortunately. But we are driving bricks.

I`d love to know why the autos are so bad on fuel compared with the manuals - is it the extra weight, the timing of gear changes or some design inefficiency (is it just an old tech gearbox). I would love a new 6 speed auto in my current vehicle. I now manually shift the gears using the sports shift which I *think* helps but it could be a placebo haha.

oh and it puffs a little bit of black smoke on take off so i`m going to clean the MAF and see if that helps. The trip computer is also out by about 0.6 of a litre - i.e it reports that i`m doing 0.6 of a litre better than i actually am.
I log my fuel use and refuel on an empty tank - my figures are at the pump and not based on the trip computer.

[SLIMaxPower]

I puff black smoke alot - currently running tune 12, turbo set for 30 PSI - consider I am towing a 2T tandem trailer, fuel economy is irrelevant as there is none. Think I will increase my 300ml mineral oil to every tank instead of every 3.

[thebaton]

Just did 384.5 km and decided to fill the tank up having seen some relatively cheap fuel. Bear in mind the trip computer is saying I'd been doing 9.3l per 100km at this point.

I. Added 42.15 litres of diesel and 12.33 litre s of lpg
I.e 10.96 litres of diesel plus 3.21 litres of lpg per 100km

I've cleaned the maf sensor and put in a new air filter...let's see how that goes on the next fill up

[thebaton]

Also I honestly wonder about the accuracy of the servo fuel pumps now

[Crash486]

Also I honestly wonder about the accuracy of the servo fuel pumps now

In Australia, fuel pumps are +/- 0.3% when delivering 2litres or more at standard temperature. (Anything above or below... no idea)

Up until 2006, speedometers were accurate to +/- 10% and odometers +/- 4%. Now speedometers are +/- 10% +4kph (so if you were travelling a true speed of 100kph your indicated speed could be as high as 114kph).

To make matters worse, there is NO requirement for odometer accuracy anymore to bring standards inline with Europe. ( Backward step methinks and I better start logging distances with a gps).

crash486

[RHKTriton]

The worry for us in Vic is that we get clobbered if we go 2kph over a limit. That is about a needle width on a lot of speedos.

I don't think any speedos are allowed to show less than your actual speed these days.

Re the fuel, I'm sometimes tempted to have a calibrated container on board to check what the pumps deliver but then consider, rego, insurance and tolls are the real ripoffs. ( don't actually make your car go from a to b)

[Crash486]

The worry for us in Vic is that we get clobbered if we go 2kph over a limit. That is about a needle width on a lot of speedos.

I don't think any speedos are allowed to show less than your actual speed these days.

Re the fuel, I'm sometimes tempted to have a calibrated container on board to check what the pumps deliver but then consider, rego, insurance and tolls are the real ripoffs. ( don't actually make your car go from a to b)

RHK, you are correct. Speedo should not show less than your actual speed. ADR 18/03 but can show a higher amount.

crash486

[wildturkeycanoe]

Figured I might as well post my "economy" for what it's worth. 2011 GLXR, 2.5TD. New engine has 15,000km on it, I have bullbar, roof racks and 275/65R17 muddies. Normal economy around town 15.5L/100km. Fuel warning light comes on with 400km on odometer. Worst case was a 20km drive with multiple red traffic lights, air con running and no power, 18.8L/100km. Highway driving downhill from mountains (500m drop in elevation), 12L/100km, but up hills couldn't keep speed over 90km/h. I think it has an issue....

[SLIMaxPower]

I just filled up 62.5Lts for a total of 362kms

Going on a country run for work so will be dropping tune back to 8. It's a thirsty beast

[Joel]

Ouch. I thought I was bad getting 430-450 for 60 litres. I'll stop my complaining now

[Roguegir]

65L gets me minimum 550.
2010 diesel 4x4

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[Joel]

65L gets me minimum 550.
2010 diesel 4x4

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Yep but we both tow big trailers every day.

[thebaton]

Autos or manuals?

[Joel]

2013 manual glx with plenty of extras

[Roguegir]

Mine is Manual too

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[SLIMaxPower]

Manual, 33's plus a 2T daily trailer from day dot, 25-30 boost among other things.

Our Kluger has similar economy but goes pretty hard. All the fuel specs would be for unladen weight I presume to make the figures look good.

[thebaton]

did another 700km, filled up again, and on average used 9.78 litres of diesel and 3.1 litres of LPG per 100km
(auto, MN, glx-r)

[jumbuk99]

I bought a Triton GLX 2010 MY11 4WD, turbo diesel with 4 sp auto with 120,000Km.
I'm been getting 8km/l (12.5 l per 100km) regularly at 100kmh highway driving (that's 600km from full tank).
The car was suffering severe loss of power which was fixed under warrant with new fuel pump and suction control valve.
However the poor fuel economy remains.
Can anyone recommend a Triton mechanic that can resolve this issue?

[Mayhem2015]

I bought a Triton GLX 2010 MY11 4WD, turbo diesel with 4 sp auto with 120,000Km.
I'm been getting 8km/l (12.5 l per 100km) regularly at 100kmh highway driving (that's 600km from full tank).
The car was suffering severe loss of power which was fixed under warrant with new fuel pump and suction control valve.
However the poor fuel economy remains.
Can anyone recommend a Triton mechanic that can resolve this issue?

Depending on where you live, I use a guy in [censored] who runs his own business: Packard Automotive. They do vehicle mods and engineering as well. There are a couple of mechanics there who are ex-mitsubishi so they don't have to give the bs statements about any issues. I rate those guys quite highly and I imagine they will be able to help. Might be that is needs a manifold clean. Catch can and/or EGR block for future maintenance.

[Maxiy]

I'm been getting 8km/l (12.5 l per 100km) regularly at 100kmh highway driving (that's 600km from full tank).?

hahah wish i got anywhere near that. 450-500l out of a tank normally, 550 if im SUPER Lucky

[NowForThe5th]

Went up to Sydney a couple of weekends ago...

2019-05-25 16.34.03-1.jpg

Not bad for 2.7 tonnes of brick.

[srb]

So when did you trade the Paj for an MN, Chris?

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[NowForThe5th]

I know.

Just wanted to make you blokes, with your little engines, jealous.

[srb]

Yep, I've always been jelly of the 3.2 in the Paj, it's a gem of an engine. The new generation of smaller capacity diesels are a joke in vehicles that are supposedly capable of towing 3T+

The best my MN gets at 110 on the highway is 11.5 .. Yes, it's a bit heavy at 2.6t and running mud tyres ect but that's fairly piss poor when I compare it to our old school 100 series cruiser, weighing 3.2t, and with its 4.2l 6cy td getting very similar fuel figures.


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[Maxiy]

The new generation of smaller capacity diesels are a joke in vehicles that are supposedly capable of towing 3T+

Yes, it's a bit heavy at 2.6t and running mud tyres ect but that's fairly piss poor when I compare it to our old school 100 series cruiser,

Yes mine is currently sitting at 2.4t unloaded, 32" muddies, steelies, bar, winch, sliders, Second battery, 60l fridge, full bash guards, rooftop, awning, and a heap of pvc tubes that dont help its aerodynamics, but when i compare it to my dads 2.7t, 4.5l VDJ76 which gets 8-9, im pretty disappointed

Still love my triton though, but will be considering a tune at some point.