3 litre economy

**PCH** · 22nd February 2012, 09:19 PM

My D4 has had around 3K km and the computer vs reality is around 1.5-1.8lt/100km inaccurate at each fill.

My D3 in comparison was around 0.2lt/100km inaccurate.

So far the D3 and D4 has roughly the same economy around town but on the highway the D4 is much more economical ~ 9lt/100km

I have not told the missus yet that one of the ROI's on buying the D4 was the better economy

**Graeme** · 22nd February 2012, 09:37 PM

Originally Posted by BobD

The D4 is now using slightly more than the T5 VW but with a lot more power

Its so easy to use the power uphill its no wonder fuel can be consumed. I regularly lock the gbox in 6th on hills and usually slowly back-off the throttle to allow some speed loss because I'm not in a hurry and may as well save some fuel, but occasionally open the throttle a little more just to feel the engine pulling so willingly. Real everyday western slopes consumption is around 11.5.

Platypus · 22nd February 2012, 10:27 PM

Does using a scangauge improve the accuracy of fuel consumption readout or is the info provided through the coms port also inaccurate?

**Disco4SE** · 23rd February 2012, 03:34 AM

Seriously, if you can afford to spend $90K+ on a D4 3.0, you can afford the fuel bill.
IMHO the D4 gives amazing fuel economy for a 2.8 ton vehcile, towing or otherwise. Although I have always been mindfull of fuel economy, I have never coasted down a hill in neutral etc.
I travel around 40,000 Klm's a year. If I use another 1Lt per 100Klm's @ $1.45 per Lt, this equates to an extra $580.00 per yer, or $11.15 per week. Now I think most people could afford that.

Cheers, Craig

**Graeme** · 23rd February 2012, 05:43 AM

Originally Posted by Disco4SE

...coasted down a hill in neutral

The last time I did that was over 40 years ago on a club fuel economy run. A fellow member wrote-off his R8 Gordini when the steering lock engaged.

**seano87** · 23rd February 2012, 06:05 AM

Originally Posted by Graeme

The last time I did that was over 40 years ago on a club fuel economy run. A fellow member wrote-off his R8 Gordini when the steering lock engaged.

Also can use more fuel in a modern vehicle. Most cars nowadays cut fuel pretty entirely when coasting - whereas in neutral the engine is having to still self propel, thus using fuel.

Also a bad idea for anything that has oil pumps that are engine driven. Not sure if this applies to the D4, but IIRC the R380 oil pump is rev related. Mmm things spinning whilst vehicle going 110 and engine idling.

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