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Opinions on Engine Flushes? #4548805
10/20/17 12:10 AM
10/20/17 12:10 AM
Joined: Oct 2017
Posts: 6
WA
DimondPhilup Offline OP
DimondPhilup  Offline OP
Joined: Oct 2017
Posts: 6
WA
I personally think it is a bunch of [censored]. There are so many detergents in oil nowadays that you should never have to flush your engine as long as you are taking care of your vehicle and are doing oil changes on time. I have been told by many automotive technicians that it can actually do more harm than good and even looking at most manufacture service intervals and recommendations not one of them have ever advised doing an engine flush. I would love to hear what others opinions are and their experiences with HIGH detergent oil cleaning products.

Re: Opinions on Engine Flushes? [Re: DimondPhilup] #4548808
10/20/17 12:25 AM
10/20/17 12:25 AM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline
Joined: Sep 2010
Posts: 7,485
S California
No matter what oil you use sludge can build up if the engine is abused and oil changes skipped. If you are playing catch up with such an engine and want to use a quick flush, be very careful. You should have a good idea of what you're up against or you should seek help. This thread should get you a lot of suggestions. If you're not dealing with a sludged up engine don't use an engine flush. Regular maintenance done correctly is all you need. Leave the oil additives and flushes on the shelf where they belong, no in your engine.

For me, I've used Auto-Rx with excellent results even though admitting that here will get me flamed. Auto-Rx has had a rocky ride here at BITOG. Lots of people are experts on how it works even though they've never used it, they just know. It will never gain a following here bor lots of reasons besides how it works. The owner of the company is not a people person, just a good chemist.

Re: Opinions on Engine Flushes? [Re: DimondPhilup] #4548814
10/20/17 12:43 AM
10/20/17 12:43 AM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
My opinion is that they're dangerous.

Re: Opinions on Engine Flushes? [Re: DimondPhilup] #4548816
10/20/17 12:44 AM
10/20/17 12:44 AM
Joined: Sep 2014
Posts: 1,414
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,414
Seattle-ish, WA
Originally Posted By: DimondPhilup
looking at most manufacture service intervals and recommendations not one of them have ever advised doing an engine flush


You missed MB. They used to recommend it.

Sometimes it is appropriate. Sometimes not.

Re: Opinions on Engine Flushes? [Re: DimondPhilup] #4548827
10/20/17 01:42 AM
10/20/17 01:42 AM
Joined: May 2012
Posts: 5,363
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline
Joined: May 2012
Posts: 5,363
Fort Lauderdale, FL
Subaru had an OEM one to deal with turbo screen plugging or something like that.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Opinions on Engine Flushes? [Re: DimondPhilup] #4548842
10/20/17 02:38 AM
10/20/17 02:38 AM
Joined: Jul 2016
Posts: 177
Albury, NSW
JFAllen Offline
JFAllen  Offline
Joined: Jul 2016
Posts: 177
Albury, NSW
I use one in my (sludge prone) 2001 Saab 9-5 turbo every oil change (with a sacrificial oil.) Pulls out a fair amount more extra garbage than just a sacrificial oil flush alone. I also use them when buying older cars with questionable history ([censored] imports / old stuff form the 70's, etc..)

If you follow the instructions I doubt you'll have any problems. Whether or not it's needed is on a case by case basis. In some cases I've done 2-3 sacrificial oil changes with chemical oil flushes before I've been happy with the level of garbage coming out.

Horses for courses
Jordan

Re: Opinions on Engine Flushes? [Re: DimondPhilup] #4548900
10/20/17 05:53 AM
10/20/17 05:53 AM
Joined: Mar 2004
Posts: 20,752
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 20,752
Upstate NY
Auto-Rx. Or Amsoil.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Opinions on Engine Flushes? [Re: Merkava_4] #4548913
10/20/17 06:20 AM
10/20/17 06:20 AM
Joined: Jun 2006
Posts: 370
Texas
Neely97 Offline
Neely97  Offline
Joined: Jun 2006
Posts: 370
Texas
Originally Posted By: Merkava_4
My opinion is that they're dangerous.

I agree.


6.7 cummins, Toyota 4 runner
FUMOTO
Re: Opinions on Engine Flushes? [Re: DimondPhilup] #4548928
10/20/17 06:46 AM
10/20/17 06:46 AM
Joined: Aug 2008
Posts: 18,328
Ontario, Canada
StevieC Online content
StevieC  Online Content
Joined: Aug 2008
Posts: 18,328
Ontario, Canada
I have done it with safe products like Amsoil flush which contains no solvents. I have seen these products liquefy sludge and hold it in suspension until drained out.

My dad and I did an engine job where the engine had seen long periods between oil changes. We filled it with clean oil and changed the filter, added a bottle of Amsoil flush and idled for 15 minutes. The oil that came out was very thick and black and had chunks that kept plugging the pan's drain on the way out. (Draining the old oil prior didn't have this problem)

We also have tried other flush products both solvent / non-solvent type and the best performance so far is the Amsoil one.

When we popped the valve covers after very little sludge was remaining and what was there was easily taken off.

Last edited by StevieC; 10/20/17 06:48 AM.

'18 Highlander - AMSOIL SS 0w20 / ATF / Severe Gear
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF (R.I.P)
Re: Opinions on Engine Flushes? [Re: DimondPhilup] #4549007
10/20/17 08:39 AM
10/20/17 08:39 AM
Joined: Aug 2011
Posts: 9,560
Boston, MA
HerrStig Offline
HerrStig  Offline
Joined: Aug 2011
Posts: 9,560
Boston, MA
Got a 400 K Camry which has never had a flush. Sometimes they are "dealer profit centers".

Re: Opinions on Engine Flushes? [Re: HerrStig] #4549012
10/20/17 08:41 AM
10/20/17 08:41 AM
Joined: Aug 2008
Posts: 18,328
Ontario, Canada
StevieC Online content
StevieC  Online Content
Joined: Aug 2008
Posts: 18,328
Ontario, Canada
Originally Posted By: HerrStig
Got a 400 K Camry which has never had a flush. Sometimes they are "dealer profit centers".


I never flushed my Santa Fe in my signature either because I regularly maintained it. But for known sludge monsters or those that don't take care of their vehicles it is a handy product to have. thumbsup


'18 Highlander - AMSOIL SS 0w20 / ATF / Severe Gear
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF (R.I.P)
Re: Opinions on Engine Flushes? [Re: DimondPhilup] #4549076
10/20/17 09:50 AM
10/20/17 09:50 AM
Joined: Feb 2013
Posts: 3,117
Virginia
bigt61 Offline
bigt61  Offline
Joined: Feb 2013
Posts: 3,117
Virginia
A flush can be dangerous. I'd just do short changes for a while with cheap oil instead....say 2-3k miles. Monitor how long it takes for the oil to get dark each time - that might give you an indication of progress.


92 Suburban 2500 7.4L 58k M1_0w40 5yr OCI
99 Olds Aurora 4.0L 91K M1_5w30 5yr OCI
13 Dodge Dart 2.0L 30k PP 0w20 OLM OCI
70 Camaro 5.7L 59k
Re: Opinions on Engine Flushes? [Re: DimondPhilup] #4549090
10/20/17 10:00 AM
10/20/17 10:00 AM
Joined: Aug 2003
Posts: 3,608
lllinois
salesrep Offline
salesrep  Offline
Joined: Aug 2003
Posts: 3,608
lllinois
If done moderately, an engine flush can be very beneficial for any new oil to "do" its job.
Done moderately, I don't see a down side to a flush...particularly when getting a used car.


High quality Specialized Lubricants pay for themselves!
Re: Opinions on Engine Flushes? [Re: DimondPhilup] #4549092
10/20/17 10:01 AM
10/20/17 10:01 AM
Joined: Aug 2008
Posts: 18,328
Ontario, Canada
StevieC Online content
StevieC  Online Content
Joined: Aug 2008
Posts: 18,328
Ontario, Canada
I have flushed engines this bad before opening them up with the Amsoil flush and all it does is liquefy the sludge.



'18 Highlander - AMSOIL SS 0w20 / ATF / Severe Gear
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF (R.I.P)
Re: Opinions on Engine Flushes? [Re: StevieC] #4549107
10/20/17 10:17 AM
10/20/17 10:17 AM
Joined: Oct 2005
Posts: 7,094
Colorado
Kuato Offline
Kuato  Offline
Joined: Oct 2005
Posts: 7,094
Colorado
Originally Posted By: StevieC
I have flushed engines this bad before opening them up with the Amsoil flush and all it does is liquefy the sludge.





Hence the "dangerous" comment above!

If my engine was THAT bad on a used purchase, I'd think a manual cleaning was in order, then several short OCIs with an oil with good cleaning properties (PYB or M1).

I've used Auto-RX in the past, it does seem to clean as advertised so I would consider that also.


Thick vs Thin test: 15k / 43k miles complete
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