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#4793252 - 06/21/18 02:19 PM Best additive in oil to clean sludge?
ffgb Offline

Registered: 08/07/07
Posts: 21
Loc: CA
Is it better to have higher Ca in oil to clean sludge? Or is it better to have higher ester in oil to clean sludge?
What oils have the highest amount of Ca? Mobil Turbo Diesel oil or Schaeffer, etc...???
What oils have the highest amount of ester? Redline or Maxima, etc...???


#4793278 - 06/21/18 02:43 PM Re: Best additive in oil to clean sludge? [Re: ffgb]
CT8 Offline

Registered: 10/09/14
Posts: 11210
Loc: Idaho
How much sludge is there to clean up?
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

#4793284 - 06/21/18 02:48 PM Re: Best additive in oil to clean sludge? [Re: ffgb]
SatinSilver Offline

Registered: 01/24/08
Posts: 10304
Loc: OH
If you don't want to open up the engine and manually clean it up I would do an engine flush. Pour it in, let it idle for 10-15 mins or whatever the directions state. Do not drive it while the flush is in the engine unless you want to buy a new engine. Let drain out and refill with a cheap conventional oil. Formula Shell at Home Depot for $13/jug is fine. Do about 3 short intervals of 500-1500 miles. Change pcv valve. From there keep using the FS, or PYB etc...

#4793341 - 06/21/18 04:00 PM Re: Best additive in oil to clean sludge? [Re: ffgb]
Kamele0N Offline

Registered: 02/09/15
Posts: 2084
Loc: Slovenia EU

At next OCI just "substitute" 1liter/quart with whatever ester based oil you can get online/ could be "the cheapest motocycle oil" you can get....
2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD Shell Rimula R6M 10w40

#4793347 - 06/21/18 04:09 PM Re: Best additive in oil to clean sludge? [Re: ffgb]
BrocLuno Offline

Registered: 09/06/15
Posts: 5612
Loc: Kalifornia Kollective
Seafoam. 1 oz per quart of crankcase capacity in existing oil. Run it for 20 minutes.

Change oil and filter (go oversized if one will fit). Add full can of BG109 (EPR) to new conventional oil. Drive for ~100 miles. Change oil and filter again.

Keep doing the BG109 thing 100 miles before oil change at 3,000 mile intervals. It'll get clean in a while smile

Use biggest filter that will fit. You are going to put stuff in there ...
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

#4793454 - 06/21/18 06:02 PM Re: Best additive in oil to clean sludge? [Re: ffgb]
FermeLaPorte Offline

Registered: 07/25/17
Posts: 501
Loc: Texas (south)
Marvel Mystery Oil is penetrating oil. You can add a quart or so, run it for a few days and then drop the oil. Have short Oil Change Intervals and every time add a quart or half-quart of Marvel Mystery Oil till you see some cleaning. SuperTech is the cheapest synthetic oil that you can use.

The other option is flushing the engine with engine flush. Just follow the instruction and then have short intervals with penetrating oil (Marvel Mystery)and a good branded synthetic.

See my signature for the oil I recommend.
Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.

#4793522 - 06/21/18 07:14 PM Re: Best additive in oil to clean sludge? [Re: ffgb]
barkingspider Offline

Registered: 12/22/13
Posts: 2064
Loc: socal
I would do a 5 min motor medic flush at each OCI until u are satisfied. I would do no more than 3k mile OCIs
06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)

#4793547 - 06/21/18 07:37 PM Re: Best additive in oil to clean sludge? [Re: ffgb]
jongies3 Offline

Registered: 03/11/16
Posts: 842
Loc: MT
I don't personally recommend engine flushes, you don't want something big to break loose and clog an oil passage, leading to a bigger problem later on. Any HDEO, conventional or synthetic at recommended intervals will do wonders. I'm especially a fan of the cleaning ability of Rotella T6 synthetic, it's also very cheap and easy to find anywhere yet a really stout brew. Better to clean it up over time than all at once is the way I see it!
2004 Toyota Tacoma 3.4 V6: Mobil 1 AFE 0W-30, FRAM TG-3600 filter
1996 Ford Contour 2.5 V6 QSGB 5W-30, MC FL-500S filter

#4793574 - 06/21/18 07:56 PM Re: Best additive in oil to clean sludge? [Re: ffgb]
supton Offline

Registered: 11/09/08
Posts: 12147
Loc: NH
What is the sludge doing? I'm wondering if it's best to leave sleeping dogs lie. Just change the oil often. Maybe frequent changes will slowly pull out stuff. I pulled the valvecover on my car a year ago, and then last month, and I *think* there was a bit less varnish. Think. Maybe. Perhaps...

I have no proof other than "it feels good" but I suspect that changing oil brands on every change might do something to loosen up sludge. Let the different additives and chemistry attack in their different ways. Probably a trivial effect but what the heck, chase the sales.

I forget if conventional is better at cleaning than synthetic. Something about being more polar.

But I'd think that once oil was getting changed often enough, that sludge and varnish would be arrested in its development?
2011 Toyota Camry, base, 2.5L/6MT, 162k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 143k, ours
1999 Toyota Camry LE, 2.2L/4AT, 183k, his

#4793598 - 06/21/18 08:26 PM Re: Best additive in oil to clean sludge? [Re: ffgb]
SubieRubyRoo Offline

Registered: 05/14/12
Posts: 1232
Loc: Winchester, Indiana
A true solvent or a boutique oil that specifically references carbon removal like Valvoline Premium Blue Restore is the only thing that is really going to perform "cleaning". Several of the oil formulators here have reinforced that plain detergents do not actually "clean" so much other than maybe washing away some of the goop.

Kreen is probably one of the more highly regarded solvents on the board, Trav had a great 60+ page thread on it if you search. I used Kreen in my Odyssey and it took off a good bit but not all of the varnish under the valvecover. I'm sure a couple more rounds of it will get it looking as good as new, not that varnish alone really hurts anything.

MMO is tried and true but takes much longer, then you have Gumout AIO, Seafoam, and a couple others (Amsoil, Motor Mechanic, etc.)

#4793644 - 06/21/18 09:26 PM Re: Best additive in oil to clean sludge? [Re: ffgb]
volk06 Offline

Registered: 10/04/10
Posts: 4917
Loc: Midwest
You want a high Magnesium oil. Thats why many people recommend HDEO for clean ups as they usually have a good does of magnesium, however, many PCMO are now using magnesium due to SN+ and D1G2.
2011 F-150 Ecoboost
2012 Focus S
2001 Taurus

#4793804 - 06/22/18 03:52 AM Re: Best additive in oil to clean sludge? [Re: ffgb]
Ducked Online   content

Registered: 10/25/12
Posts: 4430
Loc: Taiwan
For immediate results Under the rocker cover, use a spoon or a fat drinking straw.

In this case, synthetic is best, since polythene is sufficiently flexible to conform to the surface.

#4793807 - 06/22/18 03:56 AM Re: Best additive in oil to clean sludge? [Re: ffgb]
jakewells Offline

Registered: 12/28/12
Posts: 523
Loc: Cave City KY
substitute one quart of oil with a quart of diesel and run it for 20 minutes before a oil change. It always worked for me in a dirty engine.
1994 Ford F150 302 4R70
Chevron Delo SAE 30 CF/SL Fram XG8A
1978 Chevy Nova 250 I6 3 on the tree.
Rotella 10W40 Fram TG30

#4793831 - 06/22/18 05:22 AM Re: Best additive in oil to clean sludge? [Re: ffgb]
MoneyJohn Offline

Registered: 03/01/12
Posts: 178
Loc: Southern NY
I always wondered if you add diesel or kerosene in the crankcase, how would you dispose of that oil? Every time I drop off my used oil at Autozone, they ask me, if I have used any additive. So I even stopped adding Marvel Mystery oil (I noticed, it helped slightly.)

Now I have been using 2:1 Synthetic blend and synthetic oil and the car drives far better. Before next oil change, I plan to add Kano Labs' Kreen, idle for 20 min, drain and fill up with synthetic only.

I didn't want to open the crankcase cover to check for the sludge so I decided to go this way. Trav was esp. helpful on the thread I posted a while ago.
2015 Subaru Forester 2.5i Premium w/ EyeSight
2006 Nissan Sentra 1.8S Special Edition

#4793914 - 06/22/18 08:08 AM Re: Best additive in oil to clean sludge? [Re: ffgb]
kschachn Offline

Registered: 12/26/05
Posts: 9504
Loc: Upper Midwest
And yet the first response on here by CT8 asking how much sludge there is hasn't been addressed nor answered by the OP.

One wonders if there is even a problem to begin with as is the case with most of these types of questions.
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 397K
2000 Toyota ECHO, 267K

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