Thread: Discovery 4 fuel economy and tank size irregularities

The most i have ever got in mine has been 76L,which at times is a PITA.

As for range,don't really know,generally gets 9 to 11L/100 on a run,and 12 to 13l/100 around town.

The unfortunate news is that sounds about right to me.

I usually cover between 500-600km per tank (indicator down to zero km or beyond), and it usually takes around 70 Lt. to fill. The most I've ever managed to fit was around 77lt, but that was after covering around 50km beyond the 0km warning...

Note - most of my driving during the week is in stop/start city traffic, rear of the vehicle always heavily loaded up with shelves, fridge and work tools, I have a full length roof platform & awning, and running LT A/T tyres, so I don't expect great economy.

Here’s a screen shot of my fuel record. The high figures were towing the 1.5-1.8 ton camper. Most of the time I’m driving around town, and I have Maxxis 980 AT tyres which east the fuel by an extra 1-1.5lt/100km.

The tank still has around 100km of travel (10L) in it when the range indicator hits 0Km. As for the range on a tank itself - overly optimistic they were for sure

I get much the same figures for driving when not towing, about 9 -11 per 100. Up to 18 when towing our small van and more with a headwind..... try Port Hedland to Broome when the easterly is howling along in the early morning. Why they can't put a bigger tank in these things I don't know.
But I never allow the level to drop below a quarter as I don't want muck from the bottom of the tank being sucked up, so don't know how much a fill from empty is anyway.
AlanH.

Originally Posted by ATH

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But I never allow the level to drop below a quarter as I don't want muck from the bottom of the tank being sucked up, so don't know how much a fill from empty is anyway.

I had this discussion with my brother the other day. I haven't seen the fuel pick up system in a tank but I would guess it's at the bottom of the tank? If so, isn't the 'muck' potentially being sucked all the time?

So what is the difference in the tank arrangement between the D4 and D3/RRS. Many people have complained about the D4 issue but I have no issue with my RRS as regularly put over 80 litres in its tank which is the same as a D3.

As there does not seem to be an issue with the tank system in the D3/RRS it would seem unlikely that they would have needed to change for the D4 - but clearly something is different.

Garry

Like some others here I have never been able to get much more than ~70 litres into the tank when supposedly empty.

Supposedly the diesel fuel tank has a capacity of ~82 litres. I suppose it retains ~10 litres for 3 reasons

1 To maintain some additional range when indicated empty. I'm guessing but maybe you get 5 - 6 litres for this.
2 After that ~5 litres is used the engine begins to simulate running empty. I guess you get to use a litre or so of fuel during this carry on.
3 After simulating an empty tank for a bit but before actually running empty the engine will shut itself down. The manual says it needs ~4l of fuel in the tank to restart. So I guess it retains that 4 litres of fuel.

~70 + ~5 + ~4 + ~ a bit adds up to near 82 litres.