I just saw this video regarding diesel engines and was wondering if is it true that you need to run the diesel engine like 40 mins so that the DPF does not get clogged?


BTW, This video is quite informative.


Is this true for all diesel engines?

not true.

i drive hilux more than 1 year and it was awesome.

very durable one.

fuel consumption, air cond, space are very worth for money.

but the worst thing is road tax and maintenance,. used 2 bottle 4L engine oil every interval service.

This post has been edited by otai_g: Sep 27 2017, 09:43 AM

Your commute is more than 40 mins? Mine rarely exceed 30 mins

DPF is not mandatory in Msia. However you will likely find it in recond cars. But then again, how many recond diesels are there...

if the car is CBU then also depends on where CBU..

if im not wrong DPF is not available for diesel car that is sold in MY except recond cars
all due to the low grade euro2 diesel that we're still selling

everytime my drive is less than 30 minutes city drive only.. wonder it will happen to my diesel engine..

however i often warm up the engine every morning for about 3 minutes before drive off from the garage

Triton driver here btw

This post has been edited by Jasonist: Sep 27 2017, 10:37 AM

Triton and Hilux dont have DPF.. mostly european diesels that has dpf.. because of the strict euro regulation..

EGR yes.. but egr robs power..

Depends on how the car is tuned. Mine. with EGR and without EGR no difference at all. still punchy. only when the ECU detects the EGR being block then it will detune. celaka

What car is that? Conti?
With EGR, the oxygen content in the combustion chamber is reduced.. giving a cooler burn.. and reducing NOx emission..
Blocking off the EGR will give more power because of the higher oxygen content... maybe not enough fuel injected when your EGR is blocked, deswai feels like detune..

I see.

I Just start and reverse immediately. Let the ECU decide what to do. Put in D and just let car crawl to junction. If clear cross, if not just wait there. I will still let the engine warm-up as I drive alike <40km to the next traffic light 800m away. Until engine up to temp, I stay below 2k rpm

exhaust recirculation only happens duriing low or no load. meaning if you're boosting the valve is closed and you're running fully on air and diesel. the likelihood of why you're experiencing low performance could stem from a few factor.

1. Detuned setup for 4X4. For offroad cars, you don't need aggressive immediate torque. that may cause unnesessary traction lost. In addition, they also offer low range gear to prevent too much over spin and lose traction.
2. clogged vanes.
3. ECU adaptation and self learning required.
4. PCV clogging the intake and turbo fins reducing the efficiency of drawing air.
5. plausible clogged intercooler due to oil vapor from PCV.

My Hilux is 5 years this year with 180,000km clocked. No such rule that I know of and I always thrash the car. Still working fine today. Changed brake disc once though.

you can look for 7L diesel engine oil.
an example: Mannol Diesel Extra 10W40 Semi synthetic

The Mazda CX-5 Diesel engine does have a DPF and needs to be run like such at least once a week to clear/burn out stuff.

if that car has a DPF
its best to pump euro 5 diesel right from the start
DO NOT go for the euro 2 that some are still selling
its gonna clog it up

I have mazda 6 2.2 diesel, never the engine needed to trigger dpf regeneration, our weather so hot, easily reach operating temperature to burn off a lot soot even if short drive

Yeah it does, confirmed online and via trustworthy SA.. The DPF needs to be replaced at 100K km and costs 2K according to SA.. Thanks for the tip. Same thing current owners advise. I do intend to only pump Euro 5.. More and more stations are offering it around places I travel.. So should be okay.. If have to go to places without, then must fill up tank to max first to avoid pumping Euro2.

I don't understand.. You mean your car has never triggered the function or that you jokingly assume that our weather is so hot that all soot is burnt off on it's on even with a short drive?

most cold weather driven short time will trigger an active regen.

our hot weather even with short drives, until now i have never seen an active regen, i.e the engine is happy no soot buildup,

and mazda doesn't calculate the soot loading, there are two exhaust pressure sensors one before DPF and one after DPF to measure the blockage, so if the engine doesn't do a regen, the DPF is physically clean

I see.. Provided the sensors aren't broken and or the proper signals aren't being triggered.. Then sounds about right. My understanding is that one needs to go on the highway and drive at certain speeds for a certain duration and then the system checks and triggers accordingly. Driving short drives alone will not trigger this and the soot should be building up depending on driving frequency.. At least, that's how It was explained to me by the SA.

There is two models active regen and passive regen

Active regen , the engine will rev up, inject fuel after combustion to purposely send it out the exhaust into the DPF as accelerant to burn the soot. This the engine will do itself once it detects too much differential pressure in the DPF, but is bad for engine if it is interrupted because all the excess fuel will leak into engine oil and dilute it. Sometimes no choice but always when active regen is happening to let it finish.

Passive regen, that is simply driving at highway speeds for 10-20 minutes , the exhaust gas remains hot enough to burn off the soot hence no action needed, sort of self cleaning as you drive. Most of us do anyways for sure once every few months for long weekends or whatever.

Important is to use euro5 always. Once twice euro 2 in emergency is okay, but daily meal always euro 5

And that's it , nothing much to do except cruise the highways and enjoy all that torque

Sweet! Don’t have to concern myself about that then.. Next up, getting Mazda Malaysia to acknowledge the recent Diesel engine fiasco and adjust warranty accordingly.