Change engine oil and flush with more oil, useful or useless?

[Mala23]

Hi everyone, I plan to change the engine oil myself, so I looked for more information and videos on the subject to do it in the best way. The idea was to try to clean the engine a bit from debris (I bought the van that already had 200k km) but I don't trust using additives like flush, because I'm afraid of possible damage. I saw the video that I'll link below where the guy who does the oil change suggests doing one or more washes with half oil to clean the engine, but this also scares me a bit, so I ask you experts for an opinion, could it be useful? Or do you have your own method? Or do you consider it useless? Many say that changing the color of the oil from clear to black is not a problem, but I would still like to be able to do it well, even if it wastes a bit of oil and money. Thank you very much for your advice.

 

[DaveD]

Flushing the engine with clean oil is an added expense and leaves you with more oil to dispose of. I'm not convinced that it serves a purpose.
I get the engine up to operating temp then drop the oil through the sump plug, remove the old oil filter and leave it to drain for at least 15 minutes before replacing sump plug and new filter and refilling with oil. I do mine every 8 - 10K miles, frequent servicing is more important than engine flushing, IMO.

 

[Sasquatch]

Provided the van has previously been serviced on schedule and with the correct lube there is nothing to be gained by not doing a straight sump-dump, changing the filter, refilling, and getting on with life.

 

[mopardave]

Flushing the engine with clean oil is an added expense and leaves you with more oil to dispose of. I'm not convinced that it serves a purpose.
I get the engine up to operating temp then drop the oil through the sump plug, remove the old oil filter and leave it to drain for at least 15 minutes before replacing sump plug and new filter and refilling with oil. I do mine every 8 - 10K miles, frequent servicing is more important than engine flushing, IMO.

I do the same.......but I just watched something that says getting the oil hot first is a waste of time with modern synthetic oil! I'll still be dropping hot oil!!

 

[oldiebut goodie]

Modern oils still get thinner when hot is my viewpoint.

 

[Sasquatch]

I do the same.......but I just watched something that says getting the oil hot first is a waste of time with modern synthetic oil! I'll still be dropping hot oil!!

And you'd be wise. By getting the oil hot you of course reduce its kinematic viscosity so it flows out better, but it also puts some contaminants into suspension which sends them out the drain plug with the oil. It's a minor point as the filter would catch most of them eventually, but it's good to play every card in rhe deck.

 

[Dellmassive]

WARM oil is thinner, so will drain faster.

HOT oil is a burns risk. ( modern day H&S risk assessment stuff)

so the general rule is a warm engine . . around 50degC

not hot, not cold but somewhere in the middle.

Three bears stuff.

+++++++

i used to use Wynes oil flush and stuff,. . .

but these days with modern synthetic oils, im happy to just drain and replace.

follow a sensible service interval of 10k miles or 1year and your golden.

some people i know on here go less, some even down to 5k miles. - more frequent is better, but verses the cost. (im happy at 10k )

i think the 18k miles long life interval is not great for the engine . . . and is a sales pitch for fleet managers ( total cost of operation over 3years etc etc)

 

[Extol]

Also the time of the years is something I take in to consideration when I change oil in my cars( so far this has worked okay).
VW recommends 0W30 for my T6.1. I use this in Winter time, and will switch to 5W30 in summer. (same formula, ash content, etc..)
and I do 5000 mile/ 6 month Oil changes.

 

[Richard T6.1]

Also the time of the years is something I take in to consideration when I change oil in my cars( so far this has worked okay).
VW recommends 0W30 for my T6.1. I use this in Winter time, and will switch to 5W30 in summer. (same formula, ash content, etc..)
and I do 5000 mile/ 6 month Oil changes.

In this context, I've found this video very interesting and insightful (as most of his videos are). Besides the title and cause that triggered the making of the vid, it covers the wider context of oil viscosity and the why's, do's and don't around it. Excellent info imo.