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[citroenguy]

The DPF in my dads C5 lasted about 125 000 miles, mostly motorway driving though. Was about 500£ to replace at a dealer. PSA uses an additive called Eolys to make dpf regen possible at a lower temperature. Therefore it can more easily regenerate.

[Marks DTM Calib]

You should actually never have to replace a DPF as the ash build up with high mileage is easily removed (plenty of companies offering this service and can be done to a lesser extent with a large compressor and blowing it through the wrong way......lots comes out!).

Some manufacturers use an additive (which of course needs topping up) which lowers the DPF regen temperature by circa 50 deg C and a smaller DPF (tends to limit the time between regens to circa 500 miles) is also used which heats up a bit faster. This all helps but if you do loads of town driving it will still catch you out unless you can react to a regen and get on a good drive.

[STEMO]

You should actually never have to replace a DPF as the ash build up with high mileage is easily removed (plenty of companies offering this service and can be done to a lesser extent with a large compressor and blowing it through the wrong way......lots comes out!).

Some manufacturers use an additive (which of course needs topping up) which lowers the DPF regen temperature by circa 50 deg C and a smaller DPF (tends to limit the time between regens to circa 500 miles) is also used which heats up a bit faster. This all helps but if you do loads of town driving it will still catch you out unless you can react to a regen and get on a good drive.

These Renaults/Nissans don't appear to show any signs of attempting a regen. Just can't figure it out. Wifey has done nearly 6000 miles in hers and no sign of any lights, no funny smells, no increased mpg, no increased fan speed.......nowt.

[Marks DTM Calib]

It will have done many in that time, she must do a few clear runs?

[STEMO]

It will have done many in that time, she must do a few clear runs?

A roads for, maybe, a clear five mile run.

[Field Marshal Dr. Opti]

It will have done many in that time, she must do a few clear runs?

A roads for, maybe, a clear five mile run.

Nah.....that's what she tells you.

In reality she drives all the way down to London to see her fancy man.

Foot to the boards all the way.

[Nick W]

These Renaults/Nissans don't appear to show any signs of attempting a regen. Just can't figure it out. Wifey has done nearly 6000 miles in hers and no sign of any lights, no funny smells, no increased mpg, no increased fan speed.......nowt.

Manufacturers found that when a regen light illuminated many drivers would stop the car, thinking there was a fault. Which doesn't help the process. They've reduced any noticeable symptoms as far possible for the same reasons. And I know it says in the manual what is happening, why, and what to do, but very few people actually read the things.


Putting a soot filter in the exhaust, and expecting to burn it clean using the same process that created the soot in the first place is an idea that has kneejerk and 'fixing' a symptom rather than the problem written all over it.

[X30XE]

These Renaults/Nissans don't appear to show any signs of attempting a regen. Just can't figure it out. Wifey has done nearly 6000 miles in hers and no sign of any lights, no funny smells, no increased mpg, no increased fan speed.......nowt.

Manufacturers found that when a regen light illuminated many drivers would stop the car, thinking there was a fault. Which doesn't help the process. They've reduced any noticeable symptoms as far possible for the same reasons. And I know it says in the manual what is happening, why, and what to do, but very few people actually read the things.


Putting a soot filter in the exhaust, and expecting to burn it clean using the same process that created the soot in the first place is an idea that has kneejerk and 'fixing' a symptom rather than the problem written all over it.

Good point.  They need to invent one that compresses it into bales like that air ram vacuum. Then when it's full you can just lob it into a hedge and carry on.

[STEMO]

Setting fire to your waste products and then releasing the fumes into the atmosphere can't be all that green, surely? 

[McBandy]

I know Peugeot use adblue (is it called that? ) That's what our buses use, if anyone doesn't know it's just pig piss! Don't know about Renault but about the time I left Fiat their latest derv POS engine (multijet 2 iirc) didn't need a regeneration cycle as it injected fuel 8 times a second (I remember seeing a very fancy graph)! Very clever people that lot, if you want innovation look at Fiat (sorry for all the brackets)(ps I hated Fiat before working for them, same as Vauxhall!).

[Marks DTM Calib]

I know Peugeot use adblue (is it called that? ) That's what our buses use, if anyone doesn't know it's just pig piss! Don't know about Renault but about the time I left Fiat their latest derv POS engine (multijet 2 iirc) didn't need a regeneration cycle as it injected fuel 8 times a second (I remember seeing a very fancy graph)! Very clever people that lot, if you want innovation look at Fiat (sorry for all the brackets)(ps I hated Fiat before working for them, same as Vauxhall!).

Totally different, Adblue is for NOx reduction (its Urea) and has no impact on particulate levels, its used by all manufacturers with cars/engines above a certain size (smaller units can get away with a fancy catalyst)  . All these bluemotion and bluetec cars basically have Adblue injection

And its 8 injections per cycle, this has no impact on regeneration and they still do regenerate, what it does do is reduce noise and improve power delivery 

Oh yes, the Fiat and Gm 1.3/1.9/2.0 engines are the same power plant

[Auto Addict]

In 40k plus, I've never experienced a regen. on my Insignia.

[TD]

In 40k plus, I've never experienced a regen. on my Insignia.

It must have done loads of them in 40k miles, if it hasn't the your living on borrowed time for the EML to come on and the vx dealer telling you it needs a new DPF 
But its the same in my Mondeo.....ive never noticed it doing one...

[Auto Addict]

How do you detect if it's doing a regen?

[citroenguy]

The "live" fuel consumption goes up.