Sorry, the Lioness has "tidied" the owners manual so I cannot find it.

After doing several short runs with no long runs to clear the DPF

I was looking for some indication that the regen was necessary,

are there any warnings on the dashboard at all?

not to my 'limited' knowledge, it just does it!

A well covered issue in the Octy section though the octy manual doesn't cover it very well. When up to temperature your yeti will get rid of some of the soot via a passive regen. It does this as a matter of course. Next is the active regen which happens when either you have reached circa 600 miles since the last active regen or the soot has reached a predetermined level which ever comes first. During this phase you get no lights on the dash, but may notice a hot smell from the dpf as its heated to a higher than normal temperature at this stage and fuel consuption will go up. You will also notice tickover at stationary goes up to around 1050 rpm. If you interupt a regen by switching the engine off part way through you'll hear both fans funning flat out for a few minutes until, its cooled down. It should complete the regen next time you're out on a decent run. If you get the yellow dpf light on then its a sign its tried to do a number of active regens and failed or hasn't got hot enough to do an active one and tne soot has built up further so you then need to drive it until the light goes out. Next one after that is both the yellow dpf and yellow eml light on. You would need to go to the dealer then or find someone witn vcds to complete a forced regen. Normally you won't get any lights at all and it will do the active one without you knowing. If it is doing an active regeneration its a good idea to not drive in top at low revs especially at this time of year, drop it down a cog to increase the revs until its finished. Nothing to worry about with the CR engine though expect more during the winter as the engine takes longer to warm up so the amount it can do during the passive stage drops. HTH

Good post....

I noticed my first ever regen last week, I stopped at my destination opened the door and there was a very high temperature smell from underneath, the rad fan was blowing too...

So I thought this was a regen, but clearly not completed, but the next day we had a 100 mile journey.

I anticipated that we would have plenty of fuel to do the return journey, when we arrived....

But when we started the return journey, it barely had enough fuel to do 109 miles, so too close for comfort, so an earlier refuel than planned was required.

So how much extra fuel does a regen use?

How often? How long does it take?

and the obvious question, with those two factors above, what is the impact on fuel consumption overall, I bet the Government fuel figures don't take this into account when calculating them.

Can I ever achieve the fuel figures that Skoda claim for my Greenline?

I think that these figures cannot ever be achieved !

Edited 25 January, 201511 yr by rustic

Can I ever achieve the fuel figures that Skoda claim for my Greenline?

I think that these figures cannot ever be achieved !

No one ever achieves the official figures they are tested under entirely artificial conditions and reflect nothing like road driving. I suspect they are a cycle carried out on a dyno. Who ever led you to expect the claimed figures?

I briefly considered a Greenline as although I only do 8,000 miles a year I tow a small caravan and would recoup the extar outlay as I tend to keep my cars for a long time, Problem is I believe you need near pefect conditions of long sustained speed runs to get anywhere near the figures quoted for the greenline, and you cannot get a heated screen or spare wheel.

I went for the 110bhp 2.0 diesel. I do a 10 miles return trip to work, 4 x 600 mile return trips "up north" and a similar amount of 200 mile return trips to collect son from university. Add to this 1000/1500 miles towing.

My car is only 6 months old but regens have not caused a problem. Infact I am surprised to hear they have started several times on a cold engine after only 5 miles.

If I discount the towing the maxidot is averaging just oiver 50mpg, so realistically is in the 47/48mpg region and ties in well with the official combined figures. I do not think I would have managed this with the greenline and think I made the correct choice.

 

Colin.

So how much extra fuel does a regen use?

How often? How long does it take?

and the obvious question, with those two factors above, what is the impact on fuel consumption overall, I bet the Government fuel figures don't take this into account when calculating them.

Can I ever achieve the fuel figures that Skoda claim for my Greenline?

I think that these figures cannot ever be achieved !

Over the 2 1/2 years I've had my CR octy I have only noticed a few regens taking place -I could probably count them on 1 hand, even though it's done around a minimum of 20 in total based on at least 1 every 600 miles, so I just accept it will use more fuel when it's doing one as part of the process while the rest of the time I'm doing very nicely thankyou. But with 170 ps on tap and around 48 mpg long term it's not something that overly concerns me to be honest, though I understand this may be more important to some. How often, see my original post, but the number of regens will be more if you do short journeys and are effected by how heavy your right foot is too so as ever one's driving routine is different there's no simple answer to this one. How long, again I've only noticed a few but I would guess it takes around 10-20 miles to complete one but that's only based on my own guestimates based on the time taken between when I notice the tickover increase until when it returns to normal so my findings are not very scientific, sorry!

I would say you are correct about the government fuel consumption figures-no manufacturer is going to risk a regen part way through the test to mess up their brochure claimed figures!

It's well documented by companies like which magazine that the official figures for the eco end of the car market are by and large difficult if not impossible to obtain and should in reality only be used to compare betweeen cars in the same segment. Those who buy them just have to acceptthat in reality they won't get what they werehoping for, but will get decent mpg if they drive economically and do decent trips. Those that are on the throttle/brakes all the time (SWMBO LOL) or do short journeys will be disappointed.

No one ever achieves the official figures they are tested under entirely artificial conditions and reflect nothing like road driving. I suspect they are a cycle carried out on a dyno. Who ever led you to expect the claimed figures?

The link below explains how the test is carried out and explains its limitations.

http://www.dft.gov.uk/vca/fcb/the-fuel-consumption-testing-scheme.asp