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[Filters & Oil] Hdi oil flush?
#11
So far this has been a very interesting discussion, my conclusion is that regular oil changes with good quality oil is the best plan.

On the subject of the oil retention in the sump; would a suction pump be the best way to remove all the old oil? this has been mentioned in older posts on this site.
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#12
(13-02-2018, 08:49 AM)drc Wrote:  So far this has been a very interesting discussion, my conclusion is that regular oil changes with good quality oil is the best plan.

On the subject of the oil retention in the sump; would a suction pump be the best way to remove all the old oil? this has been mentioned in older posts on this site.


Agree completely with your first paragraph.
Regular oil changes are just a symptom of driver care, aren't they? Which suggests that the owner looks after his car in other ways also.

As for pumped oil extraction, this is largely a matter of opinion and experience.  It is usually the case that sucking the oil out (if done properly) will remove more oil WITH ITS CONTAMINANTS than draining through the sump plug. Here are a few reasons:

My Pela pump is used as I've already said - immediately after I switch off the engine. This means that the oil is not only hot, thin and extremely fluid, but any impurities have no time to settle at the bottom of the sump. The pump probe goes down the dipstick tube and hits the bottom of the sump, which allows it to extract more oil than would be drained through the sump plug. The pump reservoir is marked in litres, so I can easily verify the quantity I'm extracting.

But that is not anywhere near as important as removing the contaminants. Oil itself does not 'wear out' - it just gets diluted and contaminated. That is the primary reason why we change our oil!

Now compare that with the normal sump plug drain method. Would you drain oil through the sump plug immediately after switching off the engine? No way - it's far too scalding hot. So you wait awhile. The oil cools and settles, and so do the impurities. It's true that modern oils and engines do not produce sludge like they used to, but this cannot be overstated - the main reason for changing oil is to remove the impurities that driving the car has produced, and this is best done immediately after the hot engine has stopped. Contaminants sink fast in hot oil, and by the time you've decided that the sump is cool enough to touch, they have nicely settled on the floor of the sump pan.

It's a choice of method. The extraction pump is mine.

Gravity
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#13
(13-02-2018, 09:27 AM)Gravity Wrote:  . . . Would you drain oil through the sump plug immediately after switching off the engine? No way - it's far too scalding hot. . .

I do like . . . Take car for run, leave engine running whilst I remove under tray, turn off engine, drop oil immediately.


I would be happy to use the suction method as long as the vehicle was tilted so the oil ran to one side and the suction probe was placed in that location.


.
My vehicle .... 2006 (m59) Berlingo Multispace Desire - 1.6 HDI 92 
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#14
Ah, but I can change my oil in my best suit, standing up!

Gravity
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#15
I'm with Gravity all the way here, have used a pump bought from Lidl for about £12 a few years ago. No need to tilt the car, JJ9, the pipe is flexible so can be manoeuvred around the sump pan to find any residues. Even at it's worst a pump would remove more oil than would drain through the plug. It turns a job of at least an hour, what with removing the sump shield and crawling in the dirt, cleaning up the oil catcher and so on, into a 20 minute job standing up drinking tea. The oil is pumped straight into the previous empty can for disposal.
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#16
I always used to think that sucking out the old oil (not draining via the sump plug) was a cheap cost cutting way that a garage could save time and money, but in this case it seems to be the best way to do it.
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#17
Well I just think you are all "Suckers"   Big Grin


.
My vehicle .... 2006 (m59) Berlingo Multispace Desire - 1.6 HDI 92 
[-] The following 1 user says Thank You to jj9 for this post:
  • Gravity
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#18
It ain't the quantity drained that matters most.

Even if you get more oil by draining through the sump (which you don't), the most important aspect is catching suspended contaminants before they settle. If you don't, the contaminants just mix with your expensive new oil and prematurely degrade it.

Again - oil doesn't wear out, it just gets contaminated.  That's why you don't change your axle or gearbox oil frequently - there's little contamination because there's no combustion, as there is with engine oil.

Gravity
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#19
I've been reading this thread and found it interesting and still can't make my mind which way is best !

However for all those interested in the pump method, my local Lidl have them in stock (I believe they are available nationwide) for sale for £12.99

Ultimate Speed Oil Pump
https://www.lidl.co.uk/cps/rde/www_lidl_...tryCode=GB

I have a question, is the oil filter on a 1.6hdi on a annual change or bi annual change schedule ?


Mark

Sent from my VFD 710 using Tapatalk
[Image: 1deffbe032e9fc5aa5c8fafbdbb21a57.jpg]
[-] The following 1 user says Thank You to Satellitemark for this post:
  • doofer
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#20
[/quote]

I think that pulling the sump plug recess out will make it prone to damage!
[/quote]


The undertray on my M59 has a steel sheet section where the plug goes so probably no issue ... anyway are we all wannabe 4x4 drivers ??? my M59 never goes over a kerb let alone a grass verge.

Certainly the drain plug being recessed is a design flaw !!

I've got mine pulled out - the drain plug that is !!! Lol
2007 M59 1.6 HDi 

Serieal Berlingo owner  Heart Heart Heart
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