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Re: Sludge remediation regimen: Toyota 3MZ-FE V6 [Re: coastsider] #4633333
01/13/18 09:38 AM
01/13/18 09:38 AM
Joined: Sep 2013
Posts: 10,534
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,534
Indiana
Concern about crud or moisture buildup on or around fill caps as well as dipstick tubes isn't a huge concern. The areas are never allowed to get hot and the majority of the threads are posted during the winter months.

I've been worried about it before too.


03 Jeep WJ 4.0 200k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980

Re: Sludge remediation regimen: Toyota 3MZ-FE V6 [Re: coastsider] #4633347
01/13/18 09:49 AM
01/13/18 09:49 AM
Joined: Jul 2012
Posts: 2,378
South Carolina
alarmguy Offline
alarmguy  Offline
Joined: Jul 2012
Posts: 2,378
South Carolina
You have a good truck, would not be concerned with what you scrapped off with your finger.

With that said, yes, without question simply run an HEDO, change it every 4000 miles or so or 3 times a year (or check the manual for severe usage) depending of course it it will be a higher mileage highway vehicle (easy on the engine) or local low mileage vehicle (rough on an engine) - of course as you know, warmer climate makes it even more easy on the engine.

Personally I would not use a synthetic HDEO but thats up to you, my first preference is always conventional HDEO.

Last edited by alarmguy; 01/13/18 09:50 AM.

14 Road King (current)
08 VStar 1300 Tourer
07 Suzuki C50
Re: Sludge remediation regimen: Toyota 3MZ-FE V6 [Re: FlyNavyP3] #4633664
01/13/18 02:35 PM
01/13/18 02:35 PM
Joined: Nov 2006
Posts: 20,121
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,121
MA, Mittelfranken.de
Originally Posted By: FlyNavyP3
Originally Posted By: Trav
That engine has a crusty looking black baffle under the fill cap. If you want to know how it really looks pull a valve cover (no need to pull both just the easiest one) then you will know if you are dealing with any sort of buildup or a clean engine.
I wouldn't go much more than 3-4K OCI on these bad boys though depending on their use.


Concur with the baffle but disagree with the OCI length, I've had 1-3 ppm iron and aluminum as far out as 10,000 miles on UOA in the exact same engine. Everything from conventional to top shelf Synthetic, no difference, everything from 5w20 to SAE 30 to 20w50 no change. This engine isn't hard on oil in my experience.


Your probably right given your and the OP's location/climate. Up here in the north east with a lot of stop and go and short trips the 3.0 Toyota has a known issue for sludge even after they extended the warranty and supposedly took care of the problem.
Toyota themselves recommended 3K OCI and IIRC synthetic oil in the warranty extension letter I got some years ago.


ASE L1, Master. Deutsch Meisterbrief.
Re: Sludge remediation regimen: Toyota 3MZ-FE V6 [Re: Trav] #4634629
01/14/18 01:18 PM
01/14/18 01:18 PM
Joined: Dec 2005
Posts: 10,023
Upper Midwest
kschachn Online content
kschachn  Online Content
Joined: Dec 2005
Posts: 10,023
Upper Midwest
Originally Posted By: Trav
Your probably right given your and the OP's location/climate. Up here in the north east with a lot of stop and go and short trips the 3.0 Toyota has a known issue for sludge even after they extended the warranty and supposedly took care of the problem.
Toyota themselves recommended 3K OCI and IIRC synthetic oil in the warranty extension letter I got some years ago.

Ture, but this is the 3.3L 3MZ-FE.


1994 BMW 530i, 231K
1996 Honda Accord, 263K
1999 Toyota Sienna, 402K
2000 Toyota ECHO, 272K
Re: Sludge remediation regimen: Toyota 3MZ-FE V6 [Re: coastsider] #4634683
01/14/18 02:22 PM
01/14/18 02:22 PM
Joined: Jun 2016
Posts: 551
South OZ
KL31 Offline
KL31  Offline
Joined: Jun 2016
Posts: 551
South OZ
Same engine here in a highlander and yes that's just how the filler hole looks.

Run the havoline if you have plenty. Absolutely no need to fork out money for something that will "clean" better because it won't clean much better and there's 99% nothing to clean if the engine has full service history. Just enjoy the car and maintain it best you can.


95 MX-3 2.5L|Shell Helix Ultra 5W40|Wix 51356
04 Focus 1.8L|Wesfil Cooper WZ63|Valvoline MST 5W30
05 Kluger 3.3L|Wesfil Cooper WZ418|Magnatec 10W30 Semi Syn
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