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Motor Flush Compounds and Additives- Safe to Use? #4543446
10/14/17 06:37 PM
10/14/17 06:37 PM
Joined: Jul 2012
Posts: 145
Bucks County, PA
Hot_Ajax Offline OP
Hot_Ajax  Offline OP
Joined: Jul 2012
Posts: 145
Bucks County, PA
My oil coming out pretty disgusting. And after I put the new oil in, it is still kind of dark. Am I due for a flush or leave it alone? How do these flushes work? Add the stuff right before an oil change? Been using Mobil 1 for over 200,000 miles with 8000 mile OCI. Thanks.

Last edited by Hot_Ajax; 10/14/17 06:38 PM.
Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Hot_Ajax] #4543449
10/14/17 06:40 PM
10/14/17 06:40 PM
Joined: Jun 2010
Posts: 591
Florida
Dumc87 Offline
Dumc87  Offline
Joined: Jun 2010
Posts: 591
Florida
My favorite flush has been Heartland Xtreme Clean Motor Flush.

Completely removed a lifter tick in my 300ZX that they are notorious for. Car mostly sits, and the tick is minimal years later.

Drain oil, remove oil filter, install new filter (use a cheap one)
Add the gallon of flush, run the engine a few minutes
Drain flush, remove oil filter, install new filter (good one, like Fram Ultra)
Add oil

laugh

Edit: If it's just cleaning, I'd limit the 8K OCI's to about 2-3K and replace a quart of the Mobil with some MMO.

Edit again (LOL) - Perhaps the oil is doing just fine, and the engine is just turning the oil black due to something else, that of which I wouldn't know off the top of my head. Maybe a dirty air filter or a tune up is in order?

Last edited by Dumc87; 10/14/17 06:43 PM.

'90 Z32 - PP HM 10w30
'98 ZJ - PYB HM 10w40
'02 G20 - QS UD 5w30
'09 Matrix - QS UD 0w20
Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Dumc87] #4543466
10/14/17 06:50 PM
10/14/17 06:50 PM
Joined: Aug 2010
Posts: 68
SouthernCaliforniaDesert,USA
PalmSpringsSCal Offline
PalmSpringsSCal  Offline
Joined: Aug 2010
Posts: 68
SouthernCaliforniaDesert,USA
Maybe you should drive it a few miles and change oil again and repeat until its gone?? Could get costly,but might want to clean it up as fr as you can visualize. I dunno...Im about to face the same situation

I would worry about clogging the oil pump and screwing the engine with the strong flushes.I dont want to have to drop my oil pan to check the oil pickup screen for clogging. Ive decided to add something not as agressive as flushes Ive recently seen. My hmo adds detergents and I may try some mild flush,but first I have to learn which one that might be. That parts going to be a toughie.

Last edited by PalmSpringsSCal; 10/14/17 06:50 PM.
Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Hot_Ajax] #4543469
10/14/17 06:53 PM
10/14/17 06:53 PM
Joined: May 2016
Posts: 718
Canada
i_hate_autofraud Offline
i_hate_autofraud  Offline
Joined: May 2016
Posts: 718
Canada
First Iíd look at why you think the oil is such bad condition and turns dark so fast.
Is the crankcase ventilation working? Any vacuum leaks that cause rough running?

Any system malfunctions that prevent clean running could be your root cause, vintage engines
run dirtier then late model.

I use straight kerosene, but only when I Ďneedí to and not often, any flush additive has an
astringent quality that can dry and shrink seals causing leaks later.

When I do use a flush I let the engine idle for 20 minutes for best results and let it drain
out for 15 minutes at least to be sure itís mostly gone, then a new filter and oil. I run the
flush in the old oil, no point wasting new oil!

ENGINE OIL FLUSHES - DO THEY WORK?
https://app.box.com/s/5s5bcjdbs2e5xu9x1rqo

I use FilterMags now on my late model car, but I wish I could have used them on all
my older cars to back in the day!

It's been 4 yrs since my last flush, FilterMags and extra mags on the spin-on filter housing
likely means I'll never have to again!

FILTERMAG vs HOMEBREW
https://app.box.com/s/uxvu8dmscf5wcgftutdm0ejqwgn86tw7

Re: Motor Flush Compounds and Additives- Safe to Use? [Re: PalmSpringsSCal] #4543472
10/14/17 06:53 PM
10/14/17 06:53 PM
Joined: Jun 2010
Posts: 591
Florida
Dumc87 Offline
Dumc87  Offline
Joined: Jun 2010
Posts: 591
Florida
Originally Posted By: PalmSpringsSCal
Maybe you should drive it a few miles and change oil again and repeat until its gone?? Could get costly,but might want to clean it up as fr as you can visualize. I dunno...Im about to face the same situation

I would worry about clogging the oil pump and screwing the engine with the strong flushes.I dont want to have to drop my oil pan to check the oil pickup screen for clogging. Ive decided to add something not as agressive as flushes Ive recently seen. My hmo adds detergents and I may try some mild flush,but first I have to learn which one that might be. That parts going to be a toughie.


I'm not a fan of flushes myself, but the reason I went with the Heartland Xtreme clean is it is basically a super cleaning oil change.

Otherwise I'm with you in that I'd add "soft" cleaning agents or find a high-detergent oil (I think most are nowadays??)


'90 Z32 - PP HM 10w30
'98 ZJ - PYB HM 10w40
'02 G20 - QS UD 5w30
'09 Matrix - QS UD 0w20
Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Hot_Ajax] #4543489
10/14/17 07:09 PM
10/14/17 07:09 PM
Joined: Jun 2011
Posts: 1,759
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,759
Crawfordville FL
They're mostly safe unless you have an extreme sludge condition. None of them will directly hurt the engine but if they clean too aggressively there is potential for big chunks to come loose and clog the oil pickup. That's a bad thing.

I haven't personally seen a flush kill an engine. I've heard stories.

Tune up the engine. New filters, spark plugs, wires, PCV valve. Look for vacuum leaks. Clean the MAF and the throttle body. Run some Techron in a couple tanks of fuel.

Photos would be helpful here. Also how many miles to turn dark? The oil may be cleaning up the motor gradually. Short OCI 1-2k miles with a good oil is considered the "safe" method of cleaning.

Some also advocate a thicker grade.

If you go with frequent oil changes make use of the sales and rebates offered by the various oil blenders. Often you can get a full synthetic oil for the same price as conventional. Supertech filters are made by Wix and are an excellent cost effective option. $2.85 out the door at my Walmart


2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30
Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Hot_Ajax] #4543490
10/14/17 07:10 PM
10/14/17 07:10 PM
Joined: Sep 2005
Posts: 5,773
MIchigan
Warstud Online content
Warstud  Online Content
Joined: Sep 2005
Posts: 5,773
MIchigan
The Mobil 1 is doing a good job of keeping it clean. I'd leave it alone. Maybe a shorter OCI.

Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Warstud] #4543532
10/14/17 08:01 PM
10/14/17 08:01 PM
Joined: Nov 2008
Posts: 3,183
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline
Joined: Nov 2008
Posts: 3,183
Oshawa, Ontario Canada
The only way to tell if the motor has sludge is to open the front valve cover and see what is underneath.

If you are using Mobil 1 chances are its very clean inside.


My wife's 1997 mainly used mobil 1 for most of its life and the internals are spotless after 194,xxx km. She does a lot of short tripping.


2015 Grand Caravan SXT Plus 5w-20 PPPP/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Hot_Ajax] #4543550
10/14/17 08:22 PM
10/14/17 08:22 PM
Joined: Jan 2009
Posts: 6,307
New England
gathermewool Offline
gathermewool  Offline
Joined: Jan 2009
Posts: 6,307
New England
If you're saying you've got milkiness, chunks or signs of other issues, then that's something completely different and we need to figure out why you're having this problem, because a flush won't help.

8k intervals isn't anything special, so long as you maintained the oil level on the dipstick. Did you maintain the oil level or has it ever gone low or do you simply change it every 8k and never check between changes? What's your oil consumption.

Finally, what do you mean by disgusting? If you're saying that your oil is coming out dark, then just keep doing what you're doing - no more answers needed, nothing's wrong, and what you've been doing will work well from now until the car falls apart. End of thread.


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter
Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Hot_Ajax] #4543560
10/14/17 08:39 PM
10/14/17 08:39 PM
Joined: Mar 2008
Posts: 7,024
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 7,024
USA
They are usually useless and sometimes worse. The only thing they flush is your money.

But if you insist on using one, get the Liqui Moly brand. Napa sells it at a good price.

But really, you'd be better off with a few short OCI's with synthetic, like the M1 on sale at AAP for two more weeks.

Pull the valve covers if the job isn't difficult on your car, so you can get a better idea of how clean or dirty the engine is smile

Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Hot_Ajax] #4543587
10/14/17 09:07 PM
10/14/17 09:07 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Start doing 1700 mile OCI's with Valvoline Maxlife. Do that about 3 times. Your engine will be spotless.

Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Hot_Ajax] #4543637
10/14/17 10:31 PM
10/14/17 10:31 PM
Joined: Dec 2013
Posts: 2,098
socal
barkingspider Offline
barkingspider  Offline
Joined: Dec 2013
Posts: 2,098
socal
I have used motor medic flush w zero issues in multiple vehicles. Itíll only set you back like $4. But if u been using M1, then Iím sure the inside of your engine is clean


06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Hot_Ajax] #4543640
10/14/17 10:38 PM
10/14/17 10:38 PM
Joined: Aug 2004
Posts: 305
San Diego
FlyPenFly Offline
FlyPenFly  Offline
Joined: Aug 2004
Posts: 305
San Diego
I mean it's a bunch of solvents going through your oil passages. Maybe it'll take some varnish and smaller buildup out. Does it really change the system? Not really but it's interesting peace of mind.


2014 Mercedes GLK350 3.5L DFI
2014 Mercedes E350 Coupe 3.5L DFI
2007 Suzuki Grand Vitara 2.7L V6
Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Hot_Ajax] #4543776
10/15/17 07:12 AM
10/15/17 07:12 AM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
USA
Originally Posted By: Hot_Ajax
My oil coming out pretty disgusting. ... Been using Mobil 1 for over 200,000 miles with 8000 mile OCI. Thanks.


Disgusting? Yuk...is it all like dirty and stuff?

Lol.


Multiple Diesel and Gasoline vehicles
Re: Motor Flush Compounds and Additives- Safe to Use? [Re: Hot_Ajax] #4543838
10/15/17 09:23 AM
10/15/17 09:23 AM
Joined: Dec 2016
Posts: 6,471
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,471
Waco, TX
I wouldn't waste the money on synthetics for a car with well over 200,000 miles on it.

I'd use a cheap conventional (Harvest King oil is only $6 for 5 quarts!) and change it every 4,000-5,000


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
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