Liqui Moly DPF cleaner

[cru22z]

No access tho vcds yet. But member benough is happy to help. Suppose to meet with him last weekend but I got injured so couldn't make it. Will try see if he's free this weekend again.

[poyta]

Seems my regen occurs around every 300-400km or on half tank. And when it happens seems to catch me just when I am about to reach home. So I keep interrupting it until the Dpf light comes on then I'm off to the freeway again.

The product is called Liqui Moly Diesel Particulate Anti-clog. Hey if I can get 400kms between regens I'd be laughing. From what I understand 400kms is pretty normal - I believe its set to do a regen around the 400km mark regardless of how much soot buildup you have - mine is actually going into active regen every 80-100kms as its reaches that 30% threshold so quickly and just like you it always seem to come one 2 minutes from when I need to stop - I usually just don't stop and take it on an extended run to get the soot level down to an acceptable level which is nuisance! You should keep an eye on your oil level too - all that extra fuel being dumped into the engine during the regen process has a habit of making its way into the oil sump, essentially raising your oil levels and filling the sump with diesel - not good. I had to change my oil in under 5000kms because the level went over the maximum. Bloody DPF's - stupid idea.

[JimmyT]

Hey Poyta,

How can you tell yours is doing a regen do you get a light on the dash? Also a bit off topic when your driving around at about 1750 RPM can you feel the turbo kicking in and our like slight shutters for like a split second, but only very slight and only every now again again?

[poyta]

Hey Poyta,

How can you tell yours is doing a regen do you get a light on the dash? Also a bit off topic when your driving around at about 1750 RPM can you feel the turbo kicking in and our like slight shutters for like a split second, but only very slight and only every now again again?

No light, that only comes on if I don't successfully regeneration and the soot level doesn't decrease. I can tell its about to go into an active regen when the car develops a bit of a rough idle that I can feel when its stationary at the lights and then within 1 to 2 kms the revs rise to 1000rpm, the exhaust note changes a bit and the induction noise dramatically increases. If I turn the engine off the radiator fans seem to keep going for bit too - classic signs of an active regeneration.

For your information, that Liquid Moly stuff isn't half bad - I used to go into active regeneration every 80-90 kms or so and it took about 15-20 kms of driving at high revs to clear but after adding that stuff I have managed to drive 300kms between regens and its only takes about 6 kms to clear it.

[Greg Roles]

At new you get 800kms or so between regens. 400kms is the set figure if any sort of error puts your car onto a set milage cycle, like mine because of all the stuff I have removed lately. Regens are designed to be as unobtrusive as possible, but the car does get a bit more jerky, the idel raises 200rpm to 1000, and the car will smell "hot". If you have an aftermarket intake or exhaust, you will hear it, and an oil temp gauge always gives it away as oil goes up 10-15 degrees.

There is a solution in the pipeline, and it's not the mythical high flow DPF, I've been busy.

[cru22z]

Yes mine does it every 400km but now I am using ultimate bp and cleen diesel additive clearing the dpf light doesn't require such a long drive.

[cru22z]

The light still comes up because I always interupt the process.

[poyta]

For your information, that Liquid Moly stuff isn't half bad - I used to go into active regeneration every 80-90 kms or so and it took about 15-20 kms of driving at high revs to clear but after adding that stuff I have managed to drive 300kms between regens and its only takes about 6 kms to clear it.

Update on my progress with the Liqui Moly DPF Cleaner - this stuff is FANTASTIC!!! Cannot recommend this enough for anyone with a DPF that does a lot of city driving - I have now managed to do just over 600kms before an active regen kicked in and it only took 1km of driving to clear that so chances are it was just a scheduled regen and once the soot contact was actually measured it was turned off.
Thats great news for someone who only a month ago was having regens every 80kms ( 2 days ) and was thinking of either replace or remove options.

[benough]

Good to hear.

So, just Autobarn etc?

[poyta]

Good to hear.

So, just Autobarn etc?

Actually I got it from Andrew over at German Auto's who got it direct from Liqui Moly's office in Sydney. I haven't seen it anywhere in stores yet and its not even shown on their website. Was about $15 for a can so not too expensive and apparently its meant to be added every 3000kms or so.