markomate2
Well-Known Member
You dont use the gauge at all!
You brim the tank, zero the odometer, drive whatever distance you want, fill up again, the amount of fuel you add, is what you used to do the miles.
Convert litres to gallons, divide litres by 4.54. Divide miles by gallons = MPG.
Yes if you use more of the tank before you fill up you will reduce the error caused by the any refuelling.
Mark
You brim the tank, zero the odometer, drive whatever distance you want, fill up again, the amount of fuel you add, is what you used to do the miles.
Convert litres to gallons, divide litres by 4.54. Divide miles by gallons = MPG.
Yes if you use more of the tank before you fill up you will reduce the error caused by the any refuelling.
Mark
300bhp/ton
Well-Known Member
But that's what I mean by full to full. Obviously cross purposes.
300bhp/ton
Well-Known Member
It doesn't really matter how much fuel you drop the tank down too. The important bit is knowing how much fuel you are putting in to a certain level and how many miles you have covered.
e.g.
Fill up, either brim it. Or maybe to the first or second click on the pump.
Reset trip.
Drive until you have 'x' amount on the gauge. This could be empty, 1/4 or 1/2 tank or anywhere inbetween.
Fill up to the same point as before (ideally using the same pump if you are doing it until the pump clicks and shuts off).
Note mileage covered.
Note amount of fuel required to fill up. (litres / 4.546 = Imp Gallons).
Total mileage / gallons = mpg.
On an 18 gallon tank, half a tank is 9 gallons. Which is about the same useable fuel load on a Series Land Rover... so using half a tank is perfectly fine, so long as you start from full.
e.g.
Fill up, either brim it. Or maybe to the first or second click on the pump.
Reset trip.
Drive until you have 'x' amount on the gauge. This could be empty, 1/4 or 1/2 tank or anywhere inbetween.
Fill up to the same point as before (ideally using the same pump if you are doing it until the pump clicks and shuts off).
Note mileage covered.
Note amount of fuel required to fill up. (litres / 4.546 = Imp Gallons).
Total mileage / gallons = mpg.
On an 18 gallon tank, half a tank is 9 gallons. Which is about the same useable fuel load on a Series Land Rover... so using half a tank is perfectly fine, so long as you start from full.
gary has
Member
Think we're saying the same thingIt doesn't really matter how much fuel you drop the tank down too. The important bit is knowing how much fuel you are putting in to a certain level and how many miles you have covered.
e.g.
Fill up, either brim it. Or maybe to the first or second click on the pump.
Reset trip.
Drive until you have 'x' amount on the gauge. This could be empty, 1/4 or 1/2 tank or anywhere inbetween.
Fill up to the same point as before (ideally using the same pump if you are doing it until the pump clicks and shuts off).
Note mileage covered.
Note amount of fuel required to fill up. (litres / 4.546 = Imp Gallons).
Total mileage / gallons = mpg.
On an 18 gallon tank, half a tank is 9 gallons. Which is about the same useable fuel load on a Series Land Rover... so using half a tank is perfectly fine, so long as you start from full.
Turboman
Mab An Gov
+1 Exactly that!
Landshandy
Active Member
I've been checking the floor every stop for a go juice leak issue but no dice
Landshandy
Active Member
Half a tank vs miles done
Turboman
Mab An Gov
Try brimming the tank until you see fuel in the filler neck.And set the trip meter. Then drive until bout 1/4 on the gauge.
Then rebrim the tank, mileage is on the trip meter, exact amount of fuel on fuel receipt.
Simple to calculate, no fuel gauge error!
Found it more accurate to top up at same garage using the same pump. Insert the nozzle all the way and stop filling on first nozzle cut out. Set trip recorder to zero, run for around half a tank. Fill up the same way at the same place. This gives you fuel used and you have the mileage run.
Harrymattson
Member
I think that the methodology of working out consumption has been pretty well nailed - any news on why you are getting your ****poor economy?
Landshandy
Active Member
I think that the methodology of working out consumption has been pretty well nailed - any news on why you are getting your ****poor economy?
Just did another run from Manchester to London. On full tank I got 128miles on one and a half sections on the fuel gauge. That was driving at 50-60mph. Having been Italy for a week driving a Fiat 500L rental I was astounded at the fact I only used 20€ of fuel . Also even going up the hill with 4 people in it only rarely went over 2000 rpm.
My disco sits at 3000rpm when doing 65-70 on the motor way.
I'm tempted to take it to a rolling road and test it. If anyone is in the London area and wants to do the same let me know as they will do discounts for numerous people.
Even with my roof rack, rock sliders and nudge bar is not expect to get 15mpg from a TD5
brian47
Well-Known Member
It's fair to say that it's already been said once or twice, do NOT take any notice of anything your fuel guage tells you.
Your best bet is to take a "post-it" note and stick it over the guage (it'll be useful when it comes to doing the maths).
The only accurate ways to work out the MPG is "fill to fill" or by a programme of continuous monitoring of mileage and fuelling over a long(ish) period of maybe a couple of months.
It's also worth remembering that the Disco isn't really at it's best at the higher end of motorway speeds.
Your best bet is to take a "post-it" note and stick it over the guage (it'll be useful when it comes to doing the maths).
The only accurate ways to work out the MPG is "fill to fill" or by a programme of continuous monitoring of mileage and fuelling over a long(ish) period of maybe a couple of months.
It's also worth remembering that the Disco isn't really at it's best at the higher end of motorway speeds.
300bhp/ton
Well-Known Member
So you've chosen to ignore all the good advice given to you in this thread then.
well, I would suggest that something is wrong here... either your tacho, or the box..... 3K rpm in my D1 gives me an indicated 85 - which at the 29.1 MPH of the drivetrain, and allowing for some TC slippage, is about right. is the D2 that much lower geared ?
As above - fuel gauges are often referred to as fool gauges for the very reason that they make it up as they go along, and are unreliable - fill to fill, or don't bother.
brian47
Well-Known Member
I did think to remind him that not only did the Td5 come with five cylinders, but in the manual gearbox it also has five forward gears in the low range and another five in the high range.
I initially thought that it might be just a tad too sarcastic!
Landshandy
Active Member
Not quite, I've been in Italy and only just checked this forum properly when I've got back. Good advice and I'll make sure that when I next full up I'll base it on the pump
