I've recently started using one of the 'Fuel Consumption' website and found it a whole lot easier than using a notebook and calculator, as I used to do (and had stopped doing a while ago).

It has though shown up a significant 3mpg difference in my Yeti between the 'real calculated' consumption 35.6mpg (as shown in my signature) and the consumption displayed (reset on each full tank fuelling) on the MFD averaging 38.5mpg.

I thought that this was perhaps a calculation difference between the two methods but then when I filled my wife's Roomster the 'actual consumption' matched the 'MFD consumption' to within 0.1mpg.

I'm now thinking that as my wife's Roomster is a 1.6 petrol and my Yeti is CR140 diesel with DPF that this, the DPF, is the cause of the 3mpg difference.

If so it is a fairly hefty price to pay for getting rid of a few particles of soot!

mmmmm.

My old Octavia was the same, no DPF, but a 2.0PD140 DSG and that was about 10% out.....

Elsie the Helipad is about 9% out consistently...

Looking to get the MFD adjusted.

Mike

Yes, my brim to brim on Harvey matches yours almost exactly.The latest (and best) being 38.1 mpg as compared to the MFD reading of 42.3mpg.I put it down to Skoda trying to make the monsters real world figures look better than they really are.

To be fair I do tend to drive with a little more "vigour" than my previous rav4 :think:

I also feel at 3000miles the engine is still pretty tight,despite my attempts to loosen it up.

Does anyone have a high mileage monster for comparison?

Edited 28 February, 201115 yr by bilun777

A further comment on my thinking; the MFD reading is my 'driven' fuel consumption i.e. the fuel put into the engine via the CR system, but the DPF has fuel injected into it directly (not through the CR system) so this amount does not get taken into consideration by the MFD.

If there is an error with the MFD this will/should also show up on TSI (petrol) engines. But if petrol engined Yetis have the same actual vs, MFD fuel consumption then the difference on the TDIs will be the fuel used by the DPF; shouldn't it?

the_ratz I think has a 1.2tsi and he has altered his by 3%.

Mike

Hi!

That's correct, I have a 1.2 Petrol. I tthink I actually ended up with the correction being only 1% so the consumption is surprisingly accurate (compared to for instance the speedo...)

The DPF maybe a cause, I drive Elsie around London ......

Using the train today. Cheaper than the congestion charge & parking.

Mike

I think the MFD display over-reads, simple as that.

The DPF regeneration on the Yeti is done by increasing the idle speed of the engine, so more fuel is injected there. This brings the temperature up. It does not have fuel injected directly into the DPF.

So whatever fuel is used is shown through the maxidot.....

Mike

Comparing Maxi-dot and real brim to brim results...

Our Yeti 1.2 DSG is only 0.1mpg out.

But our Fabia Greenline overestimates by 5mpg.

Comparing Maxi-dot and real brim to brim results...

Our Yeti 1.2 DSG is only 0.1mpg out.

But our Fabia Greenline overestimates by 5mpg.

Ah ha! That's the sort of disparity I have between my Diesel Yeti and Petrol Roomster.

There's are a few comments already of diesels having a differential but we need more comments on petrol consumption comparisons.

Would it make life easier if I made up a 'Poll' at the head of this thread?