I think my DPF is almost full...

[sn809]

Another vote up for Morey's Smoke killer.
Also Neil do you mean Mobil and do u use their special diesel or the regular one?
I am trying the special one here in Albany and its not too bad. Recently renovated pump though.

[neil]

Another vote up for Morey's Smoke killer.
Also Neil do you mean Mobil and do u use their special diesel or the regular one?
I am trying the special one here in Albany and its not too bad. Recently renovated pump though.

Yeah Mobil , If I can't get my BP am forced to go to the local new metro which uses Mobil fuels and yes it says its premium diesel.
I add chemtech diesel power occasionally as well , same stuff I use in yacht , which only ever gets BP .

[sn809]

I know Ulti Bp is the best diesel, but its not available where I am now, so experimenting with Vortex and Mobil. Both with Morey's and I think Mobil is better. What do you think.

[feenix74]

We run both of our diesels run on Caltex Vortex diesel almost exclusive, unfortunately there not many BPs on our side of town. We will use Mobil diesel if Vortex diesel not available, we avoid the budget petrol stations at all cost. Have not had any issues with either vehicle, we have had Caddy since new and it now has 170k on the odo and the Golf Mk5 we have had for coming up on 2 years and have done close to 40k in that time. Golf Mk5 it has had some minor issues related to aged bits that have needed replacement but nothing that was related to fuel used. Both have been serviced regularily at our friendly local independent VW-specialist mechanic (CVWC). They use Fuch motor oils and Mann filters (OEM equipment suppliers for VW). From what I have read on this forum and elsewhere using good quality diesel, quality motor oil that meets VW specs, and quality filters and OEM-equivalent replacement parts is important in keeping the TDIs especially those with DPFs and EGRs from clogging up and causing issues.

[sn809]

Just what I was looking for. Thanks.

[ozrcboy]

Hi all - hoping someone might be able to offer some insight.

Recently replaced a g450 DPF pressure sensor on a Mk5 Golf TDI GT (125KW) after it started logged P0471s.

The new sensor kept on throwing P0473s (sensor pressure too high) which adaption through VCDS didn't seem to be correcting. So today I configured a regen via VCDS, as I understood that would reset sensor calibration on the G450.

Despite some pretty ideal driving conditions (highway mostly, for an hour, then another 30 minutes round town in low gears to keep revs high) the regens failed, and I now have the DPF regen lamp lit (and the check engine lamp too with the same P0473 logged).

Have been reading up on this tonight (and thanks for this thread - excellent). VCDS reports 41g of ash in my DPF, and, presumably because of the new sensor, the Carbon Mass Learned Value (CMLV) is 0% and the Particle Filter Load Coefficient is 20%.

So I can see a couple of scenarios, and no doubt there are others:

- The faulty g450 was giving a really high corrective factor for CMLV, which is why the ECU hasn't complained about the DPF previously.
- The new g450 is not working properly, and if it calculated the CMLV correctly I might still be in my 40gram allowance.

Car has about 150K on it. Mostly does highway now, but for the first half of its life did lots of suburban short haul. Is that about the service life of a DPF?

Any opinions on whether a DPF cleaning service will actually get rid of the ash? Or should I go re-manufactured, after market or new OEM?


Thanks all.

[Kachingg]

I would go aftermarket dpf they are much cheaper than oem still like 2k+ tho

[ozrcboy]

Turned out the replacement g450 was faulty. Cost me $350 to find out

[benough]

Update

My car is now at 255,000km and still no DPF issues

I'm apprehensive to plug my VCDS cable in to have a look...

[Pete N]

It's the Karcher bit that does all the good, but that LiquiMoly product can't hurt. I do need to look into the active ingredients of that, how it breaks up caked in ash is beyond me. Soot, yeah, easy.....but inactive, final product ash....hmmmm.

Great there are non-cut options though, much easier. I'd be interested to see just how efficient it is though, and that channel 068 a few thou in after a clean would be very, very interesting. Please post that info up, as it will tell how effective the non cut flush actually was.

I had my Golf Mk5 GTD DPF cleaned ultrasonically at DPFregen in Sydney resulting in 1% ash and no damage to the unit. It was in limp mode and I didnt know I could get a mechanic to do a forced regen via teh ECG. Was pretty impressed with the clean though.

The car gets to 40% soot every week though and I have to squirt up the freeway reading the VCDS in real time till it stops regen. I do very short drives to and from work. EGR is also probably very dirty at 148,000k. I think that may not be helping.