Better Figures then 900kms to a tank

[polo_spec_d]

It is possible why not?

But you forgot to mention the speed you were going when you got only 4.94L/100km?

Just a few things that affect fuel economy:

Keeping the speed around 90km/h (105km/h on Polo clock could be 95km/h in reality)
Aerodynamics
Outside temperature, humidity
Tyre pressure, type and condition
Flat long roads or hills.
Stop start
Weight the car is carrying
Mechanical condition of the car. ( if new are there any modifications?)
And the most important is the driver's experience and knowledge how to achieve the best fuel economy

I kept to 90km/hr on the hilly sections (40kms) and 105km/h which as you said is around 95km/h, I do have coilovers fitted to the car and lowered them to a correct height that wouldnt put handling and ride out of wack.

Humidity wasnt much of a factor as the heat here on those days was fairly dry heat.

Tyre pressure was increased to 35psi from 33psi and the tyres are in good condition. (only 15,000kms on them) The eco conti that come on the polo.

The car was carry 1 passanger and 2 over night bags, so not much weight there.

Only engine mod is the SEAT intake, but I would imagine lowering the coilovers would help with aerodynamics abit??

And last but not least is driver experience. Well I do alot of driving for work in a Isuzu NPR 200, mainly country driving as I work away through out WA and I must drive to alot of those places. I learnt from many drives that Big Semi's and other smaller trucks can be your friend when it comes to these long drives.

I used other road users infront of me to help gain this figures, But you dont get something for nothing and I help them out aswell with getting in front of them and breaking the wind.

Transporter you are very much right with the factors there.

I think it was a good idea of Transporter to list the factors, Now people have if not already on the forum a list to work with when planning long trips.

[Pumpe-Düse]

It is possible why not?

But you forgot to mention the speed you were going when you got only 4.94L/100km?

110km/h on the speedo, the whole way.

So spec d, how many km travelled and litres put in?

[polo_spec_d]

When I filled up before the trip I put 45.05L into it, and I have travelled so far 1100Kms. The fuel light is on so now its just a waiting game to when I wanna fill her back up.

When I go fill it up I post how much it takes.

[VW Convert]

I dont have a trip computer unfort, the car was dead empty when I filled up, It took 45L no more. this was the first time its ever been that empty. the car was shuttering as I came towards the servo.

When I was on the open road I sat on 105km/hr. I was just so suprised to get those kind of figures with it been so hot.

Not doubting your word or anything but if I'm reading this correctly, you got 900+ KM from a tank, you calculated 3.75L/100KM and you refilled with 45 litres? The sums don't add up, at 3.75L/100KM you would travel 1,200 KM on 45 litres.

Am I misunderstanding what you are saying or have you miscalculated?

Cheers

George

[polo_spec_d]

I havent filled up yet from that tank yet, Still going haha. when I put 45L into it was at the start of the drive.

[VW Convert]

I havent filled up yet from that tank yet, Still going haha. when I put 45L into it was at the start of the drive.

Better than 1,100 km on a tank is great, but how do you calculate your consumption if you haven't refilled?

Cheers

George

[polo_spec_d]

Well from what I put in and using the fuel gauge, eg. quarter of a tank is 11.25L, on that first quarter I gathered roughly, give or take 30kms or so 300kms. then measured the next two quarters and came back with the same figure. From what I have donw so far on the last quarter of the tank in heading to 1200kms but ill fill up 30kms short of that to see what the tank takes.

At that stage I did the calcs to return the figure 3.75L/100kms, I know this does seen very spot on but has work wonders when I cant use a MFD.

[VW Convert]

Well from what I put in and using the fuel gauge, eg. quarter of a tank is 11.25L, on that first quarter I gathered roughly, give or take 30kms or so 300kms. then measured the next two quarters and came back with the same figure. From what I have donw so far on the last quarter of the tank in heading to 1200kms but ill fill up 30kms short of that to see what the tank takes.

At that stage I did the calcs to return the figure 3.75L/100kms, I know this does seen very spot on but has work wonders when I cant use a MFD.

That's not an accurate method because the gauge may not be as accurate as we would like it to be although no doubt you are getting great mileage. What you need to do is fill it up and do the calculations based on distance travelled and the amount of fuel it takes to refill it, then you have an accurate figure.

Will be interesting to see how it pans out.

Cheers

Edit. A word of caution, running your diesel out of fuel can be very detrimental for the fuel system, the fuel cools and lubricates things like the injectors. You should keep this in mind and not let it run too low.



George

[Transporter]

I kept to 90km/hr on the hilly sections (40kms) and 105km/h which as you said is around 95km/h, I do have coilovers fitted to the car and lowered them to a correct height that wouldnt put handling and ride out of wack.

Humidity wasnt much of a factor as the heat here on those days was fairly dry heat.

Tyre pressure was increased to 35psi from 33psi and the tyres are in good condition. (only 15,000kms on them) The eco conti that come on the polo.

The car was carry 1 passanger and 2 over night bags, so not much weight there.

Only engine mod is the SEAT intake, but I would imagine lowering the coilovers would help with aerodynamics abit??

And last but not least is driver experience. Well I do alot of driving for work in a Isuzu NPR 200, mainly country driving as I work away through out WA and I must drive to alot of those places. I learnt from many drives that Big Semi's and other smaller trucks can be your friend when it comes to these long drives.

I used other road users infront of me to help gain this figures, But you dont get something for nothing and I help them out aswell with getting in front of them and breaking the wind.

Transporter you are very much right with the factors there.

I think it was a good idea of Transporter to list the factors, Now people have if not already on the forum a list to work with when planning long trips.

That is very good fuel consumption, since you were doing 110km/h at some stages I found out that when I kept the speed at 100km/h fuel gauge read 5L/100km steady, with 2 people in the car and empty boot, but driving at the night through the Adelaide with not many stops at the traffic lights I could get 4.1L/100km on the trip computer and it is 0.25L optimistic when checked against the fuel docket. So it might be better to drive less than 95km/h to get better fuel economy.
I don’t get to drive our Golf very often, so I can’t reliably tell what is the best speed in TDI Golf/Polo to get the best fuel consumption.

Ideally if you want the best fuel economy you need to plan your trip as early in the morning as possible and also humidity is the fuel economy friend since the water in the air turns onto the steam when heated up in combustion and you get extra push on the pistons. Remember that every time you don’t touch the accelerator pedal there is 0 fuel injected.

[polo_spec_d]

Well I filled up this arvo, got to 1150Km and thought I better fill up as running on that mucky stuff at the bottom of the tank cant be good for the engine. and the car took 44.3L.

So not as empty as before I started the trip.