Skoda Superb

[YZ250]

My DIL has a Shitreon C5 diesel. due to both short trips and stop and start on longer commutes has loads of DPF, EML and limp mode problems. It,s your choice in the end though.

My wife does nothing other than short trips in her diesel and never had an issue touchwood. The only thing I notice every so often is the car runs a bit hot for a while, it smells of burning and the cooling fan comes on. This is the only signs of regeneration that we notice. I have asked her to continue driving for a bit if she spots these signs but I doubt she would even notice to be honest, so that falls on deaf ears. 
I do give it an airing if I use it but apart from that it's town driving and very short trips only. Not ideal I grant you but I would imagine on Tunnie's commute it would be fine.    I suppose it depends on how the car was driven by the previous owner whether it clogs up or not. 
Can you wait for a regen to happen, remove the DPF, hollow it out, refit it and have the ecu re-programmed to not regen, as it is physically still there for MOT time. I know the legal answer but just curious. Where's the innocent whistling smiley? 

[tunnie]

I'd give it a damn good spanking ever so often, thinking about it, Friday's the roads are always fare more clear down the M3. Usually I can do the run down the M3 without stopping on a Friday.

How often do you notice the regen kick in? I don't know how often these things run, is it based on sensor data (ie it's looking blocked) - or is it miles/time?

[tunnie]

They key to diesels must be to boot it fair bit, so they don't fill up with crap? Sometimes you see a diesel X5/CX90 or other diesel saloon on the road boot it and it's like being behind The Flying Scotsman, clouds of black smoke.

If I go straight down the M3, after 50mph average ends at M25, I always given the 3.2 a boot from 50-80 as often MrsT uses it so good to get it some air.

I'd do that with a diesel too, down as far as CostCo, so semi decent blast.

[tunnie]

Ooooooo just found out the CLS of vintage of my budget have no DPF's 

[Marks DTM Calib]

Ooooooo just found out the CLS of vintage of my budget have no DPF's 

2007/2008 at a guess as that's when the Euro 4 hit home (and a car that size would not squeak through without)

[tunnie]

Ooooooo just found out the CLS of vintage of my budget have no DPF's 

2007/2008 at a guess as that's when the Euro 4 hit home (and a car that size would not squeak through without)

Think they came in at 2009 with 350 CDI

[Marks DTM Calib]

Ooooooo just found out the CLS of vintage of my budget have no DPF's 

2007/2008 at a guess as that's when the Euro 4 hit home (and a car that size would not squeak through without)

Think they came in at 2009 with 350 CDI

They must have left it very much to the last minute then!

As the Euro 5 regs were mid 2009 (sep) and given everything registered after that date would need to meet them, builds would have had to have started a good 6 months before.

[TheBoy]

Well, I struggle to get 30mpg from my shitbox diesel if not on a run. And can only manage 40mpg if I'm disciplined enough to sit at the speed limit.

I think you'll find big engine diesels uneconomical on significantly congested routes.  Its fine managing 50mpg for 10 miles, but if the other 15miles are 15mpg, then you'll likely be better off with petrol...  ...and avoid diesel service costs as well.

[tunnie]

But with petrol it's 25mpg for 15 miles, then 15mpg for 10 miles

[tunnie]

You also rag that thing everywhere!

[TheBoy]

But with petrol it's 25mpg for 15 miles, then 15mpg for 10 miles

Which if you work it out on paper, isn't much different.

BTW, even a 3.2 will manage 30+mpg on the 10 mile section.  Its the non-constant speed bit that mullers that

[TheBoy]

You also rag that thing everywhere!

I got similar from the Tractor, maybe less on non motorway trips, but that was a lot more fun.

[tunnie]

I think I would average mid 30's out of a CLS diesel on the commute, considered petrol but no real difference in purchase cost.

[TD]

Question for Mark, how often does a diesel DPF need regen cycle?

Don't think emission zone extends that far, even new one for 2020

It depends on the way they are driven, could be weekly, could be monthly....

BUT all the diesels ive driven haven't had a DPF fail.....some of them you know when they doing a regen cycle....ie idle engine revs increase....the skoda VRS I had was a good example of that.....used to idle at 900-1000rpm when it was doing a regen cycle.
If it couldn't achieve the regen cycle.....it used to put on a warning light....generally a motorway run of 10miles in 4th gear (about 3500rpm) would make the warning light to go off 
My Mondeo, ive no idea when its doing a regen cycle.....gives no clue.....but in the 6 months ive had it.....no warning light has come on about it.....and when I looked earlier today....my average speed is 17mph!  but average fuel consumption is 47.5mpg 

You could of course go for a slightly older diesel.....57reg perhaps.....it probably wouldn't have a DPF, as I think that it was made law on 08 reg's or thereabouts......

[biggriffin]

I've read this thread, and the other thread that's running in parallel with it, and all I can think is, and say is,, STOP waffling, and talking just go and buy the dam car that YOU want, not one picked by a bloody committee..