DPF

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Thu 24 Sep 2020 20:38
DPF - barney100

Much done subject but how do backroom diesel owners keep their DPFs clean?

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Thu 24 Sep 2020 21:08
DPF - daveyjp

It keeps itself 'clean' during the regen process.

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Thu 24 Sep 2020 21:15
DPF - DavidGlos
Decent run at least every two weeks. Never seen the DPF light on in 9 years and 90,000 miles in our 2011 Golf 2.0 TDI. My company car, a 2016 Golf GTD used to get frequent long runs, but since I’ve been working from home and doing mainly short runs, the DPF light has come on twice, necessitating a pointless 20 minute drive.


Compared to the DPF set up on the 2011 Golf, which hasn’t been any bother, the GTD installation seems pretty carp as it seems incapable of a passive regen and often does an active regen whilst pottering locally, shortly after a 200 mile drive. No way I’d want to run it as my own car with such a flaky DPF installation. Feels like a prime candidate for allowing the driver some control over when a filter regen kicks off, provided the driver could monitor how full the DPF is - which they can’t very easily!

Edited by DavidGlos on 24/09/2020 at 21:17

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Fri 25 Sep 2020 09:11
DPF - mcb100

Usual high mileage S-Type diesel was relegated to pottering around town in March, and pretty much remains so. I've had the yellow DPF light on twice, so took it for a bit of a run. By the time I'd got one junction up the M62, it had gone out so DPF cleaned again.

I'm not sufficiently chemistry savvy to endorse or otherwise the operation of any additives that promise DPF cleaning properties.

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Fri 25 Sep 2020 09:30
DPF - Andrew-T

I'm not sufficiently chemistry savvy to endorse or otherwise the operation of any additives that promise DPF cleaning properties.

Nor am I, but the Adblue stuff that many makers use is a strong solution of urea, a very simple cheap material. I don't know whether one might be able to make up a valid substitute, but the saving would not be huge.

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Fri 25 Sep 2020 09:40
DPF - mcb100

Adblue is injected into the exhaust, post-combustion, and doesn't mix with the diesel in the tank.

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Fri 25 Sep 2020 10:38
DPF - Andrew-T

Adblue is injected into the exhaust, post-combustion, and doesn't mix with the diesel in the tank.

Yes. I doubt that it would mix with diesel anywhere. It has a separate tank.

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Fri 25 Sep 2020 11:05
DPF - RT

I'm not sufficiently chemistry savvy to endorse or otherwise the operation of any additives that promise DPF cleaning properties.

Nor am I, but the Adblue stuff that many makers use is a strong solution of urea, a very simple cheap material. I don't know whether one might be able to make up a valid substitute, but the saving would not be huge.

Adblue is for reducing NOx and nothing to do with DPFs which are for reducing particles.

The Adblue is injected into the exhaust and then "processed" in an extra catalytic converter called SCR - there's no DIY alternative to the Adblue which is 37.5% synthetic urea and 62.5% deionised water.

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Fri 25 Sep 2020 14:28
DPF - SLO76
Regular run at 40mph or above for 20-30 miles. Forget additives and carbon cleaning, none of it really works.

Edited by SLO76 on 25/09/2020 at 14:28

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