alltrack consumption

[Diesel_vert]

Work out how much fuel the car has actually used (i.e. litres at the pump / distance travelled x 100 = average fuel consumption).

Instantaneous fuel consumption read outs are not necessarily helpful in predicting what the average will be.

[nyc863]

yeah instant is useless,
I'm going by reset MFD averages over time. They may be inaccurate as well but they tend to be optimistic

I'll do the fuelly thing as well.

[Marakai]

yeah instant is useless,
I'm going by reset MFD averages over time. They may be inaccurate as well but they tend to be optimistic

I'll do the fuelly thing as well.

The MFD is notoriously understating consumption - by 5-10% according to some posts. Owners have been known to take them to a dealer and have the display adjusted. Which is apparently possible, but I've never read about how to do that in VCDS or such.

[Hillbilly]

The MFD is notoriously understating consumption - by 5-10% according to some posts. Owners have been known to take them to a dealer and have the display adjusted. Which is apparently possible, but I've never read about how to do that in VCDS or such.

I'll say it again Fill up at a certain pump until you can see the fuel in the pipe. Go for a drive however far you want.

Come back to the same pump and with the same load in the car Fill it to the same level divide the fuel used into the KM's done.

Apart from using a known amount of fuel in a special container This is the ONLY way I would measure consumption.

The MFD readout is about as accurate as predicting the future. All these people who say I got XXXX km out of a tankful are rubbish.

How many know what the tank holds. Even saw one who said he went somewhere and had about half a tank left

How much is ABOUT HALF A TANK. They are dreaming if they think they are getting anywhere near a grip on their actual consumption.

EG measure by the tankful.

My Passat will go from Brisbane to Coffs Harbour do a bit of running round and get back to Brisbane on a tankful.

So will my 4.2l Diesel Landcruiser. Are they comparable Absolutely NOT but by saying that they appear to be.

All rubbish doing it that way as the Cruiser uses almost twice the fuel and has a tank twice the size so to some would appear to be equal.

[Marakai]

I'll say it again Fill up at a certain pump until you can see the fuel in the pipe. Go for a drive however far you want.

Come back to the same pump and with the same load in the car Fill it to the same level divide the fuel used into the KM's done.

Apart from using a known amount of fuel in a special container This is the ONLY way I would measure consumption.

Which, btw, is what you have to do on a novated lease anyway. Record odometer, record what you paid (or keep receipt of fuel card transaction). Not like the leasing company is going to let you email them an iphone photo of your MFD screen.

[Diesel_vert]

yeah instant is useless,
I'm going by reset MFD averages over time. They may be inaccurate as well but they tend to be optimistic

I'll do the fuelly thing as well.

It's a matter of choosing the correct tool, instrument or instrumentation for the job.

Instantaneous readings are there to indicate what's happening at any given time, which can be useful.

What isn't so useful, is trying to use it in order to predict an average over a certain period or distance.

I'll say it again
Fill up at a certain pump until you can see the fuel in the pipe.

If this requires the user to fill past the first click, I would discourage that, unless the need for supreme accuracy overrides the allowance of expansion.

Most owner's manuals would state not to continue filling after the first (or second) cut off.

[Hillbilly]

If this requires the user to fill past the first click, I would discourage that, unless the need for supreme accuracy overrides the allowance of expansion.

Most owner's manuals would state not to continue filling after the first (or second) cut off.

I do agree and only ever do it if I am going to use it immediately Not quite so bad on a diesel but petrol expands as you say hence the instruction not to do it. Used to do it in the Cruiser as some days every drop counted in the Outback.

Also when I had a taxi running on gas we used to bend the float to maximise a fill but we were immediately running it down.

Always did it at the start of a shift Never at the end.

[nyc863]

the mfd averages are pretty indicative, if a bit optimistic, and running the tank down to 10km range then filling to the first click off is a decent tell on consumption over a tank as well.

when the mfd is telling me I have a range of 250km at 50% full (35l) I have no reason to doubt it really is drinking more than 12/100, and has been for some time..