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#4515379 - 09/13/17 05:05 PM Hdeo vs ultra platinum to remove sludge ??
wantboost Offline


Registered: 11/03/10
Posts: 103
Loc: CA
Which will work better ?

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#4515394 - 09/13/17 05:23 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: wantboost]
SirTanon Offline


Registered: 06/23/14
Posts: 2157
Loc: Phoenix, Arizona - USA
Seems to me that both should work quite well.. but that might depend on the severity of the sludge. If it's bad enough I would be concerned about either cleaning "too well" and putting too much into circulation.

In my mind, this also depends on the car/engine you have in mind. If the car calls for lighter-weight oil, then I don't know if HDEO is necessarily your best choice, because those are all heavier-weight oils, which would mean that PUP would be the best choice.

All other things being equal, I'd probably just go with a decent SM/SN-rated HDEO and save money.
_________________________
2010 Ford Fusion SE - 2.5 liter/6F35 Trans - 257,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 55,000mi

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#4515400 - 09/13/17 05:32 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: wantboost]
dogememe Online   content


Registered: 04/15/17
Posts: 598
Loc: SF BAY AREA, CA
Just use slightly shorter OCIs of normal conventional oil a few times and you'll be fine.
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2007 Ford Crown Vic P71 4.6 ~124K Miles, SynPower 5W-30, Royal Purple Filter.
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1997 Chevy Suburban 5.7 ~214K Miles, O'Reilly FSHM, MicroGard

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#4515403 - 09/13/17 05:36 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: wantboost]
wantboost Offline


Registered: 11/03/10
Posts: 103
Loc: CA
Car calls for 5w30 dexos


Edited by wantboost (09/13/17 05:36 PM)

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#4515405 - 09/13/17 05:43 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: wantboost]
skyactiv Offline


Registered: 03/02/13
Posts: 4394
Loc: The Midwest
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#4515409 - 09/13/17 05:50 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: wantboost]
SubieRubyRoo Offline


Registered: 05/14/12
Posts: 1125
Loc: Winchester, Indiana
Dump a quart of MMO in while the engine is warm, and let it idle for 10-15 minutes in the driveway. Then change oil and filter to PUP and run about 5k. Use a good filter to keep the gunk from circulating.

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#4515425 - 09/13/17 06:02 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: SubieRubyRoo]
SirTanon Offline


Registered: 06/23/14
Posts: 2157
Loc: Phoenix, Arizona - USA
Originally Posted By: SubieRubyRoo
Dump a quart of MMO in while the engine is warm, and let it idle for 10-15 minutes in the driveway. Then change oil and filter to PUP and run about 5k. Use a good filter to keep the gunk from circulating.


Heck if the oil is a bit low on the current fill, just top it off with up to 1qt of MMO and drive the rest of the OCI with it in. I ran an entire OCI in my 2003 Mercury Sable (3.0 Duratec) when I had it, with 1QT of MMO, and the rest 5w30 Valvoline MaxLife, and it did a great job of cleaning it up over a 6000 mile OCI.
_________________________
2010 Ford Fusion SE - 2.5 liter/6F35 Trans - 257,000mi
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#4515427 - 09/13/17 06:02 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: wantboost]
wantboost Offline


Registered: 11/03/10
Posts: 103
Loc: CA
Ok thx
I run wix cartridge filters .

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#4515428 - 09/13/17 06:06 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: wantboost]
SubieRubyRoo Offline


Registered: 05/14/12
Posts: 1125
Loc: Winchester, Indiana
Yeah, Sir, MMO has a very long (and checkered, if you believe some of the naysayers here) and proven history; my dad had a 79 Chevy van with the 350 that leaked a bit, but didn't really 'use' any oil. It got an oil change roughly once a year (really just a filter change due to leaks smile ) and he would dump a quart in probably every six months while mixing with makeup oil. MMO in the gas too. One quart to a full tank, once per calendar quarter.

He sold it with somewhere north of 350k miles, and even though the van had rusted away around it, the engine still ran well and just had a very light blue haze on cold startup. Amazing how that thing lasted with no real TLC...

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#4515466 - 09/13/17 06:37 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: wantboost]
fdcg27 Online   content


Registered: 09/25/09
Posts: 15695
Loc: OH
If you have actual sludge and not merely the idea that you do, short drains for a while are in order and will clean up the engine.
For short drains, should you use a cheap oil or an expensive one?
Easy question with an easy answer.
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#4515544 - 09/13/17 08:07 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: wantboost]
CT8 Offline


Registered: 10/09/14
Posts: 10963
Loc: Idaho
How much sludge needs to be removed.
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#4515552 - 09/13/17 08:14 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: wantboost]
SubieRubyRoo Offline


Registered: 05/14/12
Posts: 1125
Loc: Winchester, Indiana
One question I have for the 'short OCI for the sludge win' crowd: it's universally acknowledged that fresh oils DO slightly increase wear rates because of the tribological magic that goes on at the metal-to-additive interface. Granted, the increase is in most cases small, but it is there. So other than frequent filter changes, why would you pick multiple OCIs over one longer cleaning period with something like MMO?

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#4515571 - 09/13/17 08:41 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: SubieRubyRoo]
kschachn Offline


Registered: 12/26/05
Posts: 9393
Loc: Upper Midwest
Originally Posted By: SubieRubyRoo
One question I have for the 'short OCI for the sludge win' crowd: it's universally acknowledged that fresh oils DO slightly increase wear rates because of the tribological magic that goes on at the metal-to-additive interface. Granted, the increase is in most cases small, but it is there. So other than frequent filter changes, why would you pick multiple OCIs over one longer cleaning period with something like MMO?

Actually the idea of new oils slightly increasing wear rates is not well supported and has been discussed here many times, here is one post (and a thread) describing the problems with that:

https://bobistheoilguy.com/forums/ubbthreads.php/topics/4439068/Re:_Should_I_leave_a_little_us#Post4439068

And also there is little proof that any additive including MMO will remove actual sludge, if present.

_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

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#4515575 - 09/13/17 08:44 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: wantboost]
kschachn Offline


Registered: 12/26/05
Posts: 9393
Loc: Upper Midwest
Originally Posted By: wantboost
Which will work better ?

Please post pictures of the actual sludge so we can see how bad it is, and what kind of sludge.
_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

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#4515592 - 09/13/17 09:00 PM Re: Hdeo vs ultra platinum to remove sludge ?? [Re: SubieRubyRoo]
ArcticDriver Offline


Registered: 01/27/17
Posts: 1139
Loc: USA
Originally Posted By: SubieRubyRoo
One question I have for the 'short OCI for the sludge win' crowd: it's universally acknowledged that fresh oils DO slightly increase wear rates because of the tribological magic that goes on at the metal-to-additive interface. Granted, the increase is in most cases small, but it is there. So other than frequent filter changes, why would you pick multiple OCIs over one longer cleaning period with something like MMO?


How does the MMO affect the metal-to-additive interface?

Thanks
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