Hilux 3 Litre Turbo Fuel Consumption

Submitted: Monday, May 30, 2005 at 19:26


My 2001 3 litre turbo Hilux Dual Cab 1 KZTE is currently using 14 litres per 100 Klm (less than 20 mpg) empty without towing. I have had the EFI checked by the local Toyota dealer which provided no answers. The diesel specialist said that there is nothing they can do as there is no adjustment on the EFI models and it would be unlikely that the injectors would require servicing. The vehicle has travelled 90,000 klm.
Has any body experienced similar economy from the same vehicle and did they have any success improving?
I have heard of an after market EFi device called a Tunit which is supposed to improve performance up to 20 %. Has anyone had experience with these devices and if so, did it improve the economy?
Any replies on the above would be much appreciated.
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AnswerID: 113631   Submitted: Monday, May 30, 2005 at 20:41

westBob replied:

there is just some thing about the way a hilux loves a drink, they are thisty but reliable my mate has a 2004 getting 14.5 l per 100ks, b/bar 10.5 tires.I have a 2004 navara td b/bar 10.5 tyres and use 9.5 litres with heaps more power then the lux cheers Bob
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FollowupID: 369868   Submitted: Tuesday, May 31, 2005 at 20:26

RussellS posted:

Bob, thanks for advice. I am a bit like a Hilux myself. That is that I love a drink after a hard days work.

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AnswerID: 113637   Submitted: Monday, May 30, 2005 at 21:13

Member - Johno (Gold Coast) replied:

G'day RussellS,

As others have said on this forum before, fuel cost are only a small part of the big piture when owning a 4by. I know you want to improve your current consumption but say that you do 20000 km a year you'll only save $660 p.a. if you get down to 11lt/100km.

By the time you buy a "tunit" and take it to various deisel mechanics you've probably spent that and more. You've bought you 'lux and wouldn't drive anything else, don't worry about how much fuel it uses. Enjoy your what you've got!

If your want to improve your fuel economy without it costing anything try different driving techniques or put more air pressure in your tyres are just some of the things that can help. The trade of here is a bumpier ride.

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FollowupID: 369866   Submitted: Tuesday, May 31, 2005 at 20:24

RussellS posted:

Sound advice on the Tunit. I will keep tinkering with tyre pressures.

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AnswerID: 113639   Submitted: Monday, May 30, 2005 at 21:24

Muddy 'doe (SA) replied:

Hi Russell,

I have the 120 prado with the 1KZ-TE in it. I think the difference is the Intercooler on the turbo and an electronic throttle.

Mine was getting about 12.5l/100 average and down to 11 on hwy at times. Then I put a full length ARB roof rack on it and lost about 1 litre / 100km. Prado is about 2200kg and I would imagine that 'lux would be a bit lighter.

Just posting for comparison sake on the similar engine in a heavier vehicle.

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AnswerID: 113650   Submitted: Monday, May 30, 2005 at 22:15

hound replied:

New 2005 hilux turbo, 10 on the highway, 12 offroad 4wding.
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AnswerID: 113652   Submitted: Monday, May 30, 2005 at 22:23

Glenno replied:

2003 TD Dual Cab Hilux here. Solid 11L per 100 whether I drove it like i stole it or just cruising around its about the same. Dont see much increase when fully loaded (have a canopy). Fuel consumption goes up with roof racks on and if I drive over 100km it starts to drink. Wound up to 120km/h up Darwin way and it was drinking 14L per 100. That was the worse. Beats a petrol anyway (thinks back to the days of 22L per hundred with the V6).

Have TJM alloy bull bar and 30*9.5R15 tyres, and a fat bastard driving.

Check your air filter my consumption always drops back after a big trip when I clean the filter.


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FollowupID: 369738   Submitted: Monday, May 30, 2005 at 23:13

BBails posted:

Can you clean the paper filter? Not sure if it's the same filter on my petrol 02. What do you do? Just bang it on the ground? My car has 30K on it and I doubt the filter has been replaced.

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FollowupID: 369739   Submitted: Monday, May 30, 2005 at 23:14

BBails posted:

Oh yeah, I just managed 16/100ks - but I flogged it a bit this tank...
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FollowupID: 369777   Submitted: Tuesday, May 31, 2005 at 11:57

gramps posted:


Slightly off the original topic but you must have stolen the V6 to get 22l/100k.

I've got over 30k on an 04 model and averaging 11.7l/100k with canopy, steel bullbar, standard skinnies and a fat bastard driving :-)) So far the worst I've done is around 16l/100k fully loaded (including SWMBO) on sand/gravel etc.


On the 04 model, the instructions for cleaning the filter are on the filter and as I recall you can use a blower on them but be careful. I just gave mine a bit of a tap and left it at that. Amazing the amount of dust that came out with just that tap.
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AnswerID: 113668   Submitted: Tuesday, May 31, 2005 at 06:46

Doc replied:

Had similar figures for a new second hilux I just bought. A change of air and fuel filters helped a lot, but I guess you have already tried this.
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FollowupID: 369870   Submitted: Tuesday, May 31, 2005 at 20:30

RussellS posted:

Yes Doc, I have tried the obvious such as filters. The new models are quoting far better economy.

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AnswerID: 113706   Submitted: Tuesday, May 31, 2005 at 11:20

Member - Jeff M (WA) replied:

My surf is a non intercooled 1kz-te like yours, weight probally about the same if not a little heavier. Consumption is about right IMO, maybe a little on the heavy side. You could probally help it by pumping your tyres up. Your running 31's right? The other guys quoting lesser figures was only running 9R's...

I'm getting about 12-14 around town depending on what we are doing. Tyre's are 31" MTRs @ 42psi all round. We are also running an Auto which does chew a lot more juice around town as there is no engine braking (one of the bigger fuel savers with diesels as they don't drink while there is no throttle).

My question to you would be: Do you have a snorkel??

If you do, take the air ram off and check for a big metal washer/restrictor (this has been mentioned on previous posts). Mine had one, apparantly it is only supposed to be installed on petrol versions however it is obvious that the guys at Opposite lock (who installed my safari) did not care to read the instructions and put it in anyway...

This thing was causing havok on my bus, overheating, blowing smoke and poor fuel economy.

If it's there, RIP IT OUT!

But poor fuel economy on turbo diesels is often air intake related. Check your air intake system, if you can make it more efficiant by removing those stupid plastic bits that wind along the body up to behind the headlight, do it. MAKE SURE YOU AIR FILTER IS CLEAN!!
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FollowupID: 369865   Submitted: Tuesday, May 31, 2005 at 20:21

RussellS posted:

Thanks for your response. I am running 9R's at 38 psi.The vehicle is fitted with a Safari snorkel which was installed before I purchased the vehicle. I will check to see if there is a restriction in the form of a washer.

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AnswerID: 113724   Submitted: Tuesday, May 31, 2005 at 14:04

floyd replied:

I have a 99 3litre with QTM Turbo (aftermarket) I have also got 700 kg's of extra stuff on the car like bars, winch and long range tank etc... When I have the canopy fully loaded with gear and my family of 4, I get 10.5-11.5 litres per 100 kms. I only use 13 when I add the boat (17ft).

I would take it to a diesel expert as your figures do not sound that good at all.
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AnswerID: 113785   Submitted: Tuesday, May 31, 2005 at 19:57

Hun replied:

Hi Russel
I have a 2002 with the same problem.I
run 10R 15 bridgestone AT duellers.If your running bigger than standard tyres you will use more fuel.pump your tyres up to 45 PSI and rides a bit harsher but you should get around 12.5 Ltr per 100 K's

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FollowupID: 369871   Submitted: Tuesday, May 31, 2005 at 20:33

RussellS posted:

Thanks Hun,
I will pump the tyres up and see how I go.

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AnswerID: 114182   Submitted: Friday, Jun 03, 2005 at 00:56

Andy C replied:


Its a "wheel miles" vs "real miles" equation before you spend money! If you don't have a GPS - borrow one and chuck a dash down the freeway to actually measure what your truck's doing.

I thought my Navara was doing something like 10.6 l/100 (50/50 city/hwy) with the speedo saying 118 when the GPS was on 110! The answer was something more like 11.4l/100km.

It's just maths - and now I've bigger rubber, the equation is in reverse!

So to answer your post, big or small diameter tyres will change not only your fuel consumption but also your comparisons if you don't take them into account.

Make sense? Don't spend money until you really know what's going on with your truck! Good luck!
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