Diesel Particulate Filters (DPF's)

[Beno]

Sorry disagree diesel engines take longer to warm up this will effect fuel consumption but far more importantly the DPF will fill up quicker which may damage your pocket. A modern engine regardless of being petrol or diesel shouldn't have any issues with lubrication providing the correct oil is used.

 

[steve333]

Sorry disagree diesel engines take longer to warm up this will effect fuel consumption but far more importantly the DPF will fill up quicker which may damage your pocket. A modern engine regardless of being petrol or diesel shouldn't have any issues with lubrication providing the correct oil is used.

^ Interesting views from the last 2 posts,i only do 7k or so a year but have a daily early morning/light traffic 26 mile roundtrip + a 110 mile roundtrip to visit relatives down the south coast once a month so my new diesel should always be running warm each trip & the dpf should get a regular clean through by what i'm reading?

 

[Vlad]

I've used it in our V70 for the seven years we've had it since new, it spends most of it's time going five miles forwards and backwards into town and gets an hour and a half run every couple of months. It doesn't smoke at all, I've never noticed it try to recycle and the performance is spot on.


I suspect your V70 does not have a DPF being 7 years old

 

[haggis2768]

Interesting,,,glad I didn't read a post like this when I first bought my 05 s203,,,apart from my initial problem,I've had no problem since,the car is regularly used for a two mile trip to work four times a day,absolutely no 'spirited' driving,if you saw the road to work you'd see why.(also I'm past ,y boy racer days),the car gets very rare long journeys yet I've had no dpf problems in three years mpg rarely dips below low forties. I do remember being shocked at fuel consumption dropping to high twenties fairly regularly when first purchased so I know now how to spot a regeneration cycle.worth noting too that I only use supermarket fuel and never put additives in the fuel.

 

[artyman]

Does cruising at a steady 70mph get it hot enough or does it need boy racer welly away from traffic lights style of driving.

 

[b1g1an]

I've used it in our V70 for the seven years we've had it since new, it spends most of it's time going five miles forwards and backwards into town and gets an hour and a half run every couple of months. It doesn't smoke at all, I've never noticed it try to recycle and the performance is spot on.


I suspect your V70 does not have a DPF being 7 years old

Oh yes it does! It's the 185 euro4 that first introduced them into the range. I read loads of posts on Volvo forums moaning about crap mileage etc due to this and from what I can summise if you put supermarket crap in them you get all the problems people moan about, put decent stuff in and you don't.

 

[peter49]

As Dr-Nab says DPF's have to go into regen at regular intervals short journeys when the exhaust system doesn't get to full operating temp it can lead to the filter clogging. The management system is continually running its diagnostic (Checking pressures across the filter, they also work off mileage accumulation) seeing the filter is getting blocked it requests a regen dumping fuel into the filter to burn off the soot. If the filter temp isn't high enough it compounds the issue (when in traffic this can be the horrible smell you sometimes get coming into the car). I wouldn't advise buying a diesel if it was mainly to run short journeys and not have a regular high speed burn off.

The majority of my driving is on M/ways at 70m/h. This equates to 1500r/m.
What do you consider a high rev burn off?
On the odd occassion that I kick down for an overtake, I tend to create black smoke for a few seconds. Is this normal?

 

[grober]

My C class handbook recommends a minimum 20 minute trip every 500 km = 300 miles. There are essentially 2 types of DPF I am lead to believe- one that involves the use of a fuel/ catalyst injection to lower burn off at lower temperature and the ones that do not. On paper the "added fuel catalyst" ones seem to be better but maybe not in real life- or you run out of catalyst to add. Diesel particulate filter - Wikipedia, the free encyclopedia

 

[steve333]

The majority of my driving is on M/ways at 70m/h. This equates to 1500r/m.
What do you consider a high rev burn off?
On the odd occassion that I kick down for an overtake, I tend to create black smoke for a few seconds. Is this normal?

Re higher rev burn off i've been advised to hold the gears at higher revs(in manual mode if auto)-has the same affect.

 

[Vlad]

Oh yes it does! It's the 185 euro4 that first introduced them into the range.

I stand corrected.

 

[b1g1an]

Oh yes it does! It's the 185 euro4 that first introduced them into the range.

I stand corrected.

Thanks

 

[Satch]

A modern engine regardless of being petrol or diesel shouldn't have any issues with lubrication providing the correct oil is used.

It is not a lubrication problem in the conventional sense but the need to use the correct lows SAPS (Sulphated Ash, Phosphorus and Sulpher) oils specified to prolong Cat. & DPF life

Designated as "C" (catalyst compatible) in ACEA terms comes in different flavours: C1, C2, C3 or C4 and need to be clear that the correct one specified is being used.

http://www.acea.be/images/uploads/files/2012_ACEA_Oil_Sequences.pdf

In MB terms oils designated as MB229.31 or MB229.51 do the trick.

 

[b1g1an]

I was meaning, and what Beno was arguing about, lubrication as in diesel is supposed to reduce the bore wear that you get starting an engine from cold and it never getting properly hot from short journeys due to its lubricating properties rather than petrol being a solvent and washing away the little that is there when cold.