Poor Fuel Eco on TD5

Crazy crazy thread this. Debating over a few mpg here and there. You've bought a 2 ton vehicle which the designers used a brick as inspiration for. If you're getting 25 mpg or more that's bloody fantastic but if you were concerned about running costs you shouldn't have bought a Landy. BTW the inland revenue use a benchmark of 40p a mile for vehicle running costs which takes into account repairs, servicing, RFL, depriciation etc etc so banging on about mpg is not that significant really.

hughesy said:

Crazy crazy thread this. Debating over a few mpg here and there. You've bought a 2 ton vehicle which the designers used a brick as inspiration for. If you're getting 25 mpg or more that's bloody fantastic but if you were concerned about running costs you shouldn't have bought a Landy. BTW the inland revenue use a benchmark of 40p a mile for vehicle running costs which takes into account repairs, servicing, RFL, depriciation etc etc so banging on about mpg is not that significant really.

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Ok I understand a bit where you are coming from, but IF you could get 30mpg rather that 24, that would be good wouldn't it?

For every 1,000 mls you would have spent about £208 (24mpg and £5 per gallon for diesel),

you would now spend £166 (30mpg and £5 per gallon) that's a saving of £42 and over 15,000mls (average annual mileage) that would be £630pa saving !!

Pays for your roadtax and servicing???

thebiglad said:

Ok I understand a bit where you are coming from, but IF you could get 30mpg rather that 24, that would be good wouldn't it?

For every 1,000 mls you would have spent about £208 (24mpg and £5 per gallon for diesel),

you would now spend £166 (30mpg and £5 per gallon) that's a saving of £42 and over 15,000mls (average annual mileage) that would be £630pa saving !!

Pays for your roadtax and servicing???

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I fully agree. You could also save a lot by doing any work yourself, shopping around for better insurance prices, etc, or indeed leaving the disco at home and walking to the shops or whatever. I was just making the point that fuel costs are just a part of the bigger picture.

hughesy said:

Crazy crazy thread this. Debating over a few mpg here and there. You've bought a 2 ton vehicle which the designers used a brick as inspiration for. If you're getting 25 mpg or more that's bloody fantastic but if you were concerned about running costs you shouldn't have bought a Landy. BTW the inland revenue use a benchmark of 40p a mile for vehicle running costs which takes into account repairs, servicing, RFL, depriciation etc etc so banging on about mpg is not that significant really.

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Not concerned about the costs just want the best from my landy possible my previous 4x4 was a 4.7 jeep so as you can see eco is not the problem.

hughesy said:

I fully agree. You could also save a lot by doing any work yourself, shopping around for better insurance prices, etc, or indeed leaving the disco at home and walking to the shops or whatever. I was just making the point that fuel costs are just a part of the bigger picture.

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Fully agree fuel costs are part of the bigger picture my point is that if some folks here atre averaging on ixed driving 30mpg and i'm doing 24mpg on a run then there is somehting wrong with my eninge surely.

Does anyone think a faulty maf could be casuing the poor fuel eco, my decat pipe arrived today so that will be fitted over the weekend, but am now thinking maybe a maf issue,.

I think you should floor it everywhere or buy a v8 then. start worrying.lmao

My landy is always laden. I get a consistent 25 mpg out of mine. even in the snow when I was towing vehicles all over the place and my engine was running constantly I was still getting a minimum of 23mpg.

If I let my wife drive she can get 35mpg from my disco.
When I drive it is around 24mpg. It has a de-cat pipe,EGR blanked, and chip tunning, and it is auto.

The de-cat was the best thing I did, pipe came from Partco/Brown Brothers for a 2001 TD5 £30 quid.
It is good thing I have a works fuel card!

rmacaul said:

If I let my wife drive she can get 35mpg from my disco.
When I drive it is around 24mpg. It has a de-cat pipe,EGR blanked, and chip tunning, and it is auto.

The de-cat was the best thing I did, pipe came from Partco/Brown Brothers for a 2001 TD5 £30 quid.
It is good thing I have a works fuel card!

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If my missus drives I'm lucky to get 1 mile per tank. I rekon she drinks fuel.

Land rovers do use alot of fuel. It does take some getting used to. I would think about putting a k&n air filter on it. Will give you about 5% better mpg. Makes the car sound better too !!! I've had them on all my land rovers.

Thanks have just ordered a performance air filter, i',m not after the best mpg in the world previous vechicle was 4.7 jeep just after the best from the truck if others are averaging 30 and i'm not then there has to be a problem.

brainboy81 said:

Thanks have just ordered a performance air filter, i',m not after the best mpg in the world previous vechicle was 4.7 jeep just after the best from the truck if others are averaging 30 and i'm not then there has to be a problem.

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A couple of points:

1. You need to get your engine on a diagnostic machine, while it's running to check the values of the various sensors;

2. I just put a de-catt pipe on my 2002 TD5 and on the current tankfull of juice I have done 480kms (300mls) and the gauge is still registering above half.

I understand that the gauge is not linear, but this is about 15% better than before the pipe was done, and i was towing a trailer for all the time.

oh my god my 110 is doing about 23/24 to gallon and i thought that was ok for such a large truck ,i do run heavily laden amd it has been chipped but its better now than b4 chipping!! also has brownchurch rack fitted,does anyone else get such bad mpg im worried now as goinfg on overland trip soon and would love 30mpg

thebiglad said:

A couple of points:

1. You need to get your engine on a diagnostic machine, while it's running to check the values of the various sensors;

2. I just put a de-catt pipe on my 2002 TD5 and on the current tankfull of juice I have done 480kms (300mls) and the gauge is still registering above half.

I understand that the gauge is not linear, but this is about 15% better than before the pipe was done, and i was towing a trailer for all the time.

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Wow thats much better than i'm getting, i've just ordered a nancom and the de cat is sitting in my garage ready to install but its snowing again here and not nice weather to get under the truck.

I'm getting about 200 miles on half a tank and on the last 3 tanks have just got 400 miles from complete full to the red light.

nigelhewitt said:

oh my god my 110 is doing about 23/24 to gallon and i thought that was ok for such a large truck ,i do run heavily laden amd it has been chipped but its better now than b4 chipping!! also has brownchurch rack fitted,does anyone else get such bad mpg im worried now as goinfg on overland trip soon and would love 30mpg

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Thats my point otheres are getting mixed drving 30mpg and i'm getting 24 on mainly extra urban driving not very ladened jsut wife and 2 babies.

I'm seriously thinking MAF sensor now as some say if they read wrong then you can loose 4 to 5 mpg, apparently it shoudl be 50 to 60 kg of air a hour on tick over and under heavy throttle conmditions 200+ waiting for my nanocom to arrive now so i can check it out.

One guy was reading 20 at tick over changed maf read 50 at tick over and went from 25 mpg to 31 mpg.

Ok your driving a 2.5+t truck loaded with a roof box in the winter using cruise control at 70mph? Ok cruise control is not good for fuel economy, roof box will add to frontal area causing more drag, the drag on a vehicle at 70mph will be MUCH greater than at 60mph, colder the ambiant air the more fuel will be used as the air is denser = more oxygen (will give more horses though)

so should i be getting better miles then mine seems to get about 345 to a tank from full to red light on which is I think about 80 ltrs which I think is about 24/gallon,iam looking at fitting over drive to improve things as ellll as noise but mainly economy as use landy for work and play so mainly road work but also long overland trip coming up soon

oldskool said:

Ok your driving a 2.5+t truck loaded with a roof box in the winter using cruise control at 70mph? Ok cruise control is not good for fuel economy, roof box will add to frontal area causing more drag, the drag on a vehicle at 70mph will be MUCH greater than at 60mph, colder the ambiant air the more fuel will be used as the air is denser = more oxygen (will give more horses though)

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Agree with what your saying but since that trip done 2 more tanks of normal road drving no top box no weight anf still 24 mpg at least its consistent

replaced maf about 6/8 months ago along with injectors, head ,turbo,still go dizzy when i think of cost but hay ho ,so should be all ok really any thoughts could just be load and driving style ?