Gotta love Tdi economy

[gldgti]

I think that gldgti is suggesting that a driver can get better economy than the cruise control as the driver can make small speed adjustments anticipating changes in the terrain (eg increase speed a bit downhill to help roll up the next hill while bleeding off a bit of speed) rather than just holding at a set speed all the time. This makes your fuel economy figures even more impressive.

exactly. What i'm really arguing is basic physics - its more efficient to do as kaanage described above than to keep the same speed. even going +5 to -5 from your cruising speed from the bottom of a hill to the top saves you fuel.

[rearrange]

Gees mate you should be able to beat those numbers....

Thanks Preeny ... maybe I should try towing a Mk1 Golf on a trailer behind me everywhere?

[kaanage]

Just did a trackday and the Polo still stayed under 12l/100km despite my best efforts to stay on full throttle for as much of the time as possible.

[5pot]

I managed 966km in my '05 Golf 2.0 TDI between Melbourne and Sydney. No fuel light either so I reckon I could have broken 1000 fairly easily before needing to refuel.

[Preen59]

Thanks Preeny ... maybe I should try towing a Mk1 Golf on a trailer behind me everywhere?

Maybe! I have new figures with proof from towing the Mk1 back home. I'll load the picture later.

[gldgti]

I have a 6R TDI Polo with DSG [With all the options, whichmakes it heavier than the standard] and I haven't really been overly impressedwith the fuel economy so far [I only use Caltex Vortex Diesel]. The brochurestates combined fuel consumption of 4.6, urban 5.5, and extra urban 4.0; so farI have done nearly 4,000kms and have average 6.0 in total; which includes fourtrips of 400+ kilometres and I have only seen a figure in the high 4's once ortwice.

I was told that once the motor bedded in a little the fuelperformance would improve, but there is no sign of it yet.
Yesterday I tried manual up shifting and using the DSG onthe downshifts on a 70+ kilometre journey on rural roads and found thatreturned a better than usual figure of 5.6; but till not brilliant. I havemucked around with cruise control and didn't find any noticeable difference inmy car.

Am I just being too picky to be expecting better fueleconomy?

The engine wont be really nice and loose and with good compression for quite a while - 20,000km at least before it gets nice and bedded in.

[William_Foster]

Thanks for the tip GLDGTi; I will keep an eye on it over the long term.

[Preen59]

As promised..

Here's proof of the mileage. This was towing a car trailer with a Mk1 on the back. A few heavy parts in the car. In the Van i had a full Mk1 Golf front clip, 2 GT3 seats, some other random parts, a tool bag and my gear. I ended up with 7.4l/100km over the intire trip. Pic is as I was cruising up the Hume. Actual GPS speed said 107km/h.




And here's the milage from a trip to Forbes on Tuesday..




Tell me your pruis can do that. Go on..

[rearrange]

As promised..

Here's proof of the mileage. This was towing a car trailer with a Mk1 on the back. A few heavy parts in the car. In the Van i had a full Mk1 Golf front clip, 2 GT3 seats, some other random parts, a tool bag and my gear. I ended up with 7.4l/100km over the intire trip. Pic is as I was cruising up the Hume. Actual GPS speed said 107km/h.




And here's the milage from a trip to Forbes on Tuesday..




Tell me your pruis can do that. Go on..

I'm jealous. I'm going to print that out and show it to my Caddy on the hope that it is embarrassed

[kaanage]

Get a remap - then you will get more torque at low rpm (as well as more power at high rpm) so you can shift earlier and use less accelerator. Plus it makes the whole car (van) more fun to drive, although you WILL use more fuel if you use the extra top end all the time.

Plus try a good (TC-W3 or JASO FB or higher) 2 stroke oil @ 200:1 in your fuel since you don't have a DPF.