QUOTE(mystvearn @ Jul 24 2017, 04:12 PM)
So this
article posted previouly does not happen then?
QUOTE(ZZR-Pilot @ Jul 24 2017, 04:14 PM)
OK... if I remember correctly, the fuss BMW made back then was with regards to Malaysia's half-arsed hot-hot chicken shit B10 biodiesel fuel. BMW claimed B10 biodiesel will fuck up BMW diesel engines.
Not the regular diesel fuel.
In my limited knowledge, the key diff between older diesel engines and Euro 5 engines is the cat converter. Euro 5 car converters are required to remove more crap in order to comply with the stricter emission standard of Euro 5, so it helps to use cleaner diesels to begin with. Right?
Therefore... it follows reasoning that using the old shit diesel in a Euro 5 car will just foul up the Euro 5 cat converter sooner. That said, there are driving techniques that you can use to 'clear up' dirty cat converters (drive until engine up to temp, then WOT to 'clear the exhaust' or some shit like that).
And even then, everybody knows cat converters will all eventually die anyway regardless. Some people even remove them outright in their quest for more power.
Catalytic converter kong is not really much of an issue, won't even show check engine light or whatever error message on car screen. The main concern is the diesel particulate filter and also most of our driving is low speed city crawl, euro 2 produces lots of this particulate. Unless we have mandatory exhaust test like developed countries, most don't even know the catalytic converter is already dead.
DPF clear the crap in it by "burning" it off inside the build in chamber, and the system uses diesel. This is called regeneration. The process utilises the exhaust heat to light off the diesel. If we don't have extended fast driving rpm above 1500 and lot's of traffic crawl, the exhaust temperature in the DPF chamber isn't high enough to burn off the crap in it. Some cars with more advanced ECU won't let you shut down the car and let the engine run till this regeneration process is completed.
But most don't have such advanced system control. If off engine while regeneration, the DPF will be soaked in "unburned" diesel and will back flow to your engine oil sump. And after sometime, the DPF don't need to be fully clogged, but there's a point of no return where unless someone did a very very long drive, the DPF just cannot fully regenerate. Anyway, after sometime also, the DPF will deteriorate anyway unless the car is purely long distance drive.
That's why, diesel cars with DPF usually have 2 indicator on their engine oil dip stick. One for regular oil change, the other upper limit is the max sump capacity inclusive of the "diesel backflow". After reaching the upper limit, like it or not, must change engine oil. Fuel dilution inside oil sump is very bad for lubrication and protection properties in the engine oil. A DPF set isn't cheap to replace...
So, to avoid all the hassle, almost all diesel engined vehicles in malaysia have no DPF installed.
Don't worry, got great news in the future, all direct injected petrol engines will need to install particulate filters and all motorists will suffer together, whether diesel or petrol