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5517 posts

Uber Geek


#205054 28-Oct-2016 08:18
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Anyone use any additives in their diesel for their cars?  I know our diesel used to be fairly crappy, but is that not a problem any more?  Is there anything that can keep the filters from getting clogged.  I don't think I have this problem, but I'd rather not encounter it.


I've heard it's recommended to fill in the mornings when it's cooler (and if possible not right after the station tanks have been filled).  And also to not empty your tank.



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Master Geek

  #1659483 28-Oct-2016 09:28
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From experience both Mercedes and BMW add a diesel additive to the fuel tank at the routine service intervals which is enough to prevent the problem of biological growth which is the usual cause of debris in the tank. The additive causes any accumulated debris to be burned off during normal driving.

Also FYI particulate filters in the exhaust system look after themselves. The system periodically injects a squirt of diesel into the exhaust (when it is hit during a long drive) which burns off particles periodically giving the exhaust a strange smell sometimes but effectively eliminating the much criticised particulate emissions.

Finally the latest Blutech technology gradually becoming available injects ultra pure urea into the exhaust system to substantially remove NOx emissions resulting in extremely clean engines with very low emissions.

3885 posts

Uber Geek

  #1660127 29-Oct-2016 00:53

I use Moreys diesel smoke killer in my old Merc Vito But mainly for the extra lube and to help preserve the seals. Sure it might just be the placebo effect and it could be fine without it. But it is cheap enough that im willing to pay for it. Supercheap auto sell it, and Repco most likely do as well.


If your diesel vehicle has a particulate filter, You need to drive it continuously at motorway speeds for at least 1/2 an hour. For it to do a complete particulate filter regeneration cycle.

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