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Engine oil flush treatments. #5079614 04/19/19 08:32 AM
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Tikka Offline OP
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Hi Gents
Did a search but found nothing much, so sincere apologies if this is 'old ground'.

Engine oil, pre change flush chemicals such as, https://products.liqui-moly.com/engine-flush-plus-3.html, for example. They use words and phrases like 'removes troublesome deposits', 'sludge' and 'lacquers'. Words to frighten the layperson.

Are they a useful 'tool' that will help keep your engine in tip top condition?

OR

Total waste of money and of no benefit in a correctly maintained engine, one that has oil changes done at the recommended intervals, using quality Oil of the correct specification.

My unqualified take on this is as follows. If an engine has 'troublesome deposits', 'sludge' and 'lacquers' then your Oil change regime is wrong. Use better oil and change more frequently.

Difference maybe in Gas or Diesel engines?

That may well be a gross over simplification so I would appreciate some opinions Gents please

Many thanks

Tikka.

Last edited by Tikka; 04/19/19 08:34 AM.
Re: Engine oil flush treatments. [Re: Tikka] #5079645 04/19/19 08:58 AM
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krismoriah72 Online Content
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There are plenty of engines that have had the best oil and frequent changes that are sludged deposited... but mostly from manufacturing defects such as poorly designed PCV and also defective rings.

Re: Engine oil flush treatments. [Re: Tikka] #5079679 04/19/19 09:24 AM
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JC1 Offline
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I've used those treatments before on used vehicles I have bought. There were no signs of neglect. Given what I've learned here, I wouldn't bother using them.

Are you trying to fix a problem motor?


2015 Grand Caravan SXT Plus 0w-20 Pennzoil Ultra/Fram Ultra Filter
1997 Honda Civic CX 5w-30 PPPP/Fram Ultra Filter
Re: Engine oil flush treatments. [Re: Tikka] #5079695 04/19/19 09:49 AM
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maxdustington Offline
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I'd rather internal sludge than external oil leaks. Why even bother.


99 Toyota Tercel CE 5EFE/C151
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Re: Engine oil flush treatments. [Re: JC1] #5079741 04/19/19 10:32 AM
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Tikka Offline OP
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Hi
I have no problems that I am aware of on my OM642 Merc' unit. But then I have not got x-ray vision smile

As I am about to perform an oil and filter change I wondered if these pre change flushes had anything solid to offer. I note that a lot of garages offer them but I just presume they look on it as a money spinner. I am always the cynic.

Tikka.

Re: Engine oil flush treatments. [Re: Tikka] #5079757 04/19/19 10:41 AM
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SubieRubyRoo Offline
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Kreen is probably the strongest internal cleaner, and like $16/quart, which is enough for two treatments. Search for a thread on it by Trav, lots of great info there. But, unless you can look through the fill hole or remove the valve cover and see there are issues, it's probably not necessary. Another, more costly option would be to run the Valvoline Premium Restore (search for a thread by JAG on it), which is specially formulated to clean and free up ring lands and other areas. But it's $74/gallon.


De omnibus dubitandum.
Re: Engine oil flush treatments. [Re: Tikka] #5079773 04/19/19 10:58 AM
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JC1 Offline
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Originally Posted by Tikka
Hi
I have no problems that I am aware of on my OM642 Merc' unit. But then I have not got x-ray vision smile

As I am about to perform an oil and filter change I wondered if these pre change flushes had anything solid to offer. I note that a lot of garages offer them but I just presume they look on it as a money spinner. I am always the cynic.

Tikka.


Of course they want to flush your wallet with needless services. Some people use kerosene to flush the motor as well. Lots of these flushes are made up of kerosene.

If you cannot open up the motor to have a look cut open the oil filter and see if anything was caught in the pleats.


2015 Grand Caravan SXT Plus 0w-20 Pennzoil Ultra/Fram Ultra Filter
1997 Honda Civic CX 5w-30 PPPP/Fram Ultra Filter
Re: Engine oil flush treatments. [Re: JC1] #5079868 04/19/19 12:13 PM
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Linctex Offline
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Originally Posted by JC1

Of course they want to flush your wallet with needless services. Some people use kerosene to flush the motor as well. Lots of these flushes are made up of kerosene.


A guy I knew bought a can of "engine flush" (it was 100% metal can) ............. "name brand" stuff

He opened it, and it was just a quart/liter of Red Diesel fuel. Nothing different at all about it - just plain red diesel.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Engine oil flush treatments. [Re: Tikka] #5083830 04/23/19 02:42 PM
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DGXR Offline
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I use engine flush products around 100,000 miles. If your engine design has known problems with blow-by, sludging or deposits, more often would be a good idea. Or just get a better vehicle that has no issues with the engine design.


1995 Corvette coupe LT1 6-speed
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1999 Yamaha YZ400FL
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Re: Engine oil flush treatments. [Re: Linctex] #5083866 04/23/19 03:19 PM
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Rmay635703 Offline
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Originally Posted by Linctex

He opened it, and it was just a quart/liter of Red Diesel fuel. Nothing different at all about it - just plain red diesel.


A question on an engine with minor sludging issues would you
After draining oil for an oil change dump a small amount of virgin off spec motor oil through the top load filter and oil fill point to clear some more of the sludge?

I have inherited many bottles of antique oil from the 80’s I can’t use along with mmo and figure I could dump it in once the drain is nearly over and get more gunk out.

I tried it and it seems to at least cosmetically get the filter housing clean and it does appear to drain out after a while.
Only takes a couple ounces to clean out, just not sure to what degree it ends up basically stuck in the engine and apart of my fill or not.

Re: Engine oil flush treatments. [Re: Rmay635703] #5084396 04/24/19 05:53 AM
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crainholio Offline
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Originally Posted by Rmay635703

A question on an engine with minor sludging issues would you
After draining oil for an oil change dump a small amount of virgin off spec motor oil through the top load filter and oil fill point to clear some more of the sludge?


I do a similar procedure on my project 4Runner which was neglected by the original owner. Oil drain plug is on the driver's side bottom of the sump, dipstick is on the passenger side of the engine. I put the vehicle passenger side front & rear on ramps to tilt it toward the drain plug. After draining the oil, I pump around 1/2 quart of Supertech oil down the dipstick hole...it washes across the oil sump and pushes out sludge that would otherwise have stayed in the sump as shown in the attached pics. I put a clean paper towel across the drain funnel after the drain, and then pumped oil down the dipstick tube, this crap came out.

IMG_2299.JPGIMG_2300.JPGIMG_2303.JPG
Re: Engine oil flush treatments. [Re: Tikka] #5116612 05/26/19 06:48 PM
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Well, you can't argue with that.


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Re: Engine oil flush treatments. [Re: Tikka] #5396158 04/07/20 08:20 AM
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Danr42 Offline
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I've been told by old mechanics to add a quart of ATF 10-15 miles before an oil change. I've done it to flush engines before with relatively new oil still light brown and after 10 miles with ATF it is black.

Re: Engine oil flush treatments. [Re: Danr42] #5396159 04/07/20 08:22 AM
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spasm3 Offline
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Originally Posted by Danr42
I've been told by old mechanics to add a quart of ATF 10-15 miles before an oil change. I've done it to flush engines before with relatively new oil still light brown and after 10 miles with ATF it is black.


Atf has little detergents, little cleaning ability. It only thins out your oil and dilutes the add-pack. I would not use that.


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03 chevy avalanche 83k synpwr 5w30
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Re: Engine oil flush treatments. [Re: Danr42] #5396220 04/07/20 09:19 AM
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demarpaint Offline
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Originally Posted by Danr42
I've been told by old mechanics to add a quart of ATF 10-15 miles before an oil change. I've done it to flush engines before with relatively new oil still light brown and after 10 miles with ATF it is black.

Not a good idea, as mentioned above.


God Bless Our Troops

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