Changing Oil & Filter on Diesel
#31
03-15-2012 | 04:58 AM
Member
Joined: May 2009
Posts: 70
From: Dartford, Kent
You obviously don't understand that the mazda system does not stop particles escaping from the exhaust, but chooses when to release them.
Time would be far better spent on reducing consumption, as using less surely means less toxins. Fix the problem, don't disguise it.
#32
03-28-2012 | 12:14 PM
Junior Member
Joined: Aug 2011
Posts: 2
#33
03-28-2012 | 12:17 PM
Junior Member
Joined: Aug 2011
Posts: 2
Hello all.
My car is a 2008 2.0D Sport.
The car is not going to make it between routine services without having an interim oil change. The oil level is about 0.5" from the dipstick "X" but is not quite halfway between services.
I guess the cause is the DPF regenerating too much allowing diesel past the pistons and into the sump.
Has anyone else experience of this? "Honest John" has a thread but apart from accepting additional oil changes it does not give too much detail.
Maybe I need to alter my driving style. Usually I keep the RPM between 1500-1800 and do open country journeys between 10-15 and 45miles with no motorway driving.
Questions.
1. How does the DPF regeneration process work and what actually triggers it? I know it uses excess fuel to burn off the carbon. Presumably it has some sort of sensor but does it work on pressure, differential pressure, measure some sort of gas or what?
2. Once regeneration is started what are the conditions required for it to be completed? I suspect it may be starting but not finishing so it keeps starting again hence allowing more diesel into the sump.
3. Should I be looking to drive at RPM of say 1800-2200 and hence making the engine work a bit harder. Also would periodic 15 minute spells of over 2000RPM help as mentioned in the handbook for if the DPF light comes on.(although in my case the DPF light has stayed off)
4. What is the significance of maintaining 2000RPM for 15minutes?
Is it simply this is the figure at which the ECU triggers regeneration or is it also linked with maintaining temperature and gas flow through the DPF whilst regeneration is taking place?
Any feedback would be appreciated.
My car is a 2008 2.0D Sport.
The car is not going to make it between routine services without having an interim oil change. The oil level is about 0.5" from the dipstick "X" but is not quite halfway between services.
I guess the cause is the DPF regenerating too much allowing diesel past the pistons and into the sump.
Has anyone else experience of this? "Honest John" has a thread but apart from accepting additional oil changes it does not give too much detail.
Maybe I need to alter my driving style. Usually I keep the RPM between 1500-1800 and do open country journeys between 10-15 and 45miles with no motorway driving.
Questions.
1. How does the DPF regeneration process work and what actually triggers it? I know it uses excess fuel to burn off the carbon. Presumably it has some sort of sensor but does it work on pressure, differential pressure, measure some sort of gas or what?
2. Once regeneration is started what are the conditions required for it to be completed? I suspect it may be starting but not finishing so it keeps starting again hence allowing more diesel into the sump.
3. Should I be looking to drive at RPM of say 1800-2200 and hence making the engine work a bit harder. Also would periodic 15 minute spells of over 2000RPM help as mentioned in the handbook for if the DPF light comes on.(although in my case the DPF light has stayed off)
4. What is the significance of maintaining 2000RPM for 15minutes?
Is it simply this is the figure at which the ECU triggers regeneration or is it also linked with maintaining temperature and gas flow through the DPF whilst regeneration is taking place?
Any feedback would be appreciated.
#34
04-11-2013 | 06:24 PM
Junior Member
Joined: Apr 2013
Posts: 5
Mada5 oil data reset
I am just bumping up this old thread for those looking only at the Mazda5 forum but not at others. There has been some progress on the DPF light and (own) oil change issues on the general tech pages here: https://www.mazdaforum.com/forum/gen...e3/#post136987 VR
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