hiten55 Posted April 28, 2015 Share Posted April 28, 2015 I've got a BMW 535d thats been doing ridiculously short journeys recently and it smells like the the particle filters getting bunged up. Really strong carbony smell on most days. According to BMW forums a 30-40 min drive at a constant 2500rpm begins a regen cycle. I did a little test and that means 50mph in 3rd gear - £££ in fuel. Also i dont like the thought of over riding the gearbox into a lower gear to up the reva for that long (at 50mph the rpm is around 1800-2000 iirc). So question is - are dpf cleaners any cop or just a waste of money? Is there any one make that stands out above the rest? Thanks, H. Quote Link to comment Share on other sites More sharing options...
hiten55 Posted April 29, 2015 Author Share Posted April 29, 2015 Anyone....? Quote Link to comment Share on other sites More sharing options...
boostman Posted April 29, 2015 Share Posted April 29, 2015 You can get them removed physically and also with software by a few places, Google dpf delete. You don't legally need one so mots will be ok! Quote Link to comment Share on other sites More sharing options...
hiten55 Posted April 29, 2015 Author Share Posted April 29, 2015 Oh really? So whats the point of them then? Quote Link to comment Share on other sites More sharing options...
David P Posted April 29, 2015 Share Posted April 29, 2015 The cost of a gallon of diesel as recommended is the easiest and cheapest option. Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted April 29, 2015 Share Posted April 29, 2015 Oh really? So whats the point of them then? To remove particulates from the exhaust and ensure the car conforms to EU emissions regs. While removal is a known tactic, I wouldn't fancy doing that to a car I was going to have to MOT every year. If there aren't rules against removing them now, there will be soon. The cost of a gallon of diesel as recommended is the easiest and cheapest option. Exactly. Take it for a long run on cruise control. It won't cost that much! Quote Link to comment Share on other sites More sharing options...
craig85 Posted April 29, 2015 Share Posted April 29, 2015 Removing a dpf, if fitted as standard will lead to a failed mot. My company car runs long journeys at well above 3000rpm on a regular basis without any trouble and I really can't see any reason why it would cost you much in fuel either. You have a 535d with earth moving amounts of torque so stop being so tight and drive it as it was meant to be driven once in a while! A heavy foot under acceleration will help keep it clear going forward Quote Link to comment Share on other sites More sharing options...
hiten55 Posted April 29, 2015 Author Share Posted April 29, 2015 Lol thanks guys, despite the way it seems in my first post im not THAT tight [emoji14] I get happy when the car goes above 20mpg lol. Although i dont let it stay there too long. Cant say im not driving it how its meant to be driven to be honest, it does get abused, usually in sports mode more than anything else. I just wasnt sure about it sitting in a low gear for that long, bimmerforums had mixed views on it. But sounds like thats the way to go so i'll try taking her for a long drive this weeked - been a while since i done that [emoji16] Quote Link to comment Share on other sites More sharing options...
boostman Posted April 29, 2015 Share Posted April 29, 2015 My bad, just Googled it and it's now part of the mot.... So yeh fuel is the cheapest solution! [emoji14] Quote Link to comment Share on other sites More sharing options...
Al Massey Posted April 29, 2015 Share Posted April 29, 2015 2500rpm isn't much or high. And if in 4th or 5th will be quite average for uk roads surely Quote Link to comment Share on other sites More sharing options...
Benjy Posted April 29, 2015 Share Posted April 29, 2015 If an MOT station offers to remove a DPF, they could potentially lose their right to test. We got a special notice a few months back. Even if the DPF is cut open and welded up, but still contains the DPF material, we have reasonable doubt as to the integrity of the filter and can lead to a fail. Just stick it in 3rd and go for a stint up the motorway at 50/60mph. It'll clear it. Car will be fine! Quote Link to comment Share on other sites More sharing options...
Scott Posted April 29, 2015 Share Posted April 29, 2015 Get out onto the motorway and wring its neck. Have you not had the DPF warning on the display? I got that a few times when I worked more locally than I do now. The way I got it to clear was to get it up to temp then cane it everywhere for a half hour or so. I then went for a nice cruise at 70mph +/- 10mph for speedo inaccuracies This was done in 6th gear and I was hitting around 40mpg so no real cost in fuel. BTW, my average consumption is around 45mpg. You must be doing seriously short journey's to be below 20. Quote Link to comment Share on other sites More sharing options...
ShawnPreece Posted April 29, 2015 Share Posted April 29, 2015 Totally different car here but me and my dad both had Vauxhall Insignia's and the DPF filter got blocked on both of ours (at different times) and we had looked through the forums and seen that ragging it above a certain rpm for a certain time would start a regen cycle so we both tried it and failed to on both, dad even travelled the whole of the M50 there and back using only 2nd or 3rd gear and still nothing, we had to take it in to Vauxhall then for them to use there computers on it to electronically start a regen whilst idle. Is most probably different on all cars but on our cars it didnt seem to work. Maybe it depends on the fault code or how clogged up they are I dont know but I wouldn't think mine would of been very clogged up as I was doing a 54 mile each way commute to work at the time which included about half of that being motorway driving. Quote Link to comment Share on other sites More sharing options...
hiten55 Posted April 29, 2015 Author Share Posted April 29, 2015 2500rpm isn't much or high. And if in 4th or 5th will be quite average for uk roads surely It redlines at 5500 roughly so its 50% Quote Link to comment Share on other sites More sharing options...
hiten55 Posted April 29, 2015 Author Share Posted April 29, 2015 Get out onto the motorway and wring its neck. Have you not had the DPF warning on the display? I got that a few times when I worked more locally than I do now. The way I got it to clear was to get it up to temp then cane it everywhere for a half hour or so. I then went for a nice cruise at 70mph +/- 10mph for speedo inaccuracies This was done in 6th gear and I was hitting around 40mpg so no real cost in fuel. BTW, my average consumption is around 45mpg. You must be doing seriously short journey's to be below 20. Nope no warning, mines pre LCI (2006) so the only thing the idrive gives is when its due to be replaced - 50k miles to go. Yeah my average daily drive is about 4-5 miles round trip. Looking at getting a smart car soon. Quote Link to comment Share on other sites More sharing options...
Chris6t9 Posted April 29, 2015 Share Posted April 29, 2015 Had my DPF Removed in my Audi for 3 years now and its never failed an MOT. Its just a visual inspection so as long as the garage done a decent job there is no way to tell its been removed. Quote Link to comment Share on other sites More sharing options...
Scott Posted April 29, 2015 Share Posted April 29, 2015 Nope no warning, mines pre LCI (2006) so the only thing the idrive gives is when its due to be replaced - 50k miles to go. Yeah my average daily drive is about 4-5 miles round trip. Looking at getting a smart car soon. Ahh that explains it, definitely not the ideal car for that sort of commute Quote Link to comment Share on other sites More sharing options...
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