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#4676756 - 02/24/18 05:03 PM Carbon buildup on Toyota pistons and rings
Cujet Offline


Registered: 02/15/03
Posts: 7162
Loc: Jupiter, Florida
https://www.youtube.com/watch?v=PgdZSXOslDM

I repeatedly mention that a quality synthetic oil is a must in modern engines. The above video clearly indicates why.
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#4676759 - 02/24/18 05:07 PM Re: Carbon buildup on Toyota pistons and rings [Re: Cujet]
PeterPolyol Offline


Registered: 03/06/16
Posts: 1345
Loc: toronto
This is why VMs are bad. Synthetic, Conventional doesn't matter to me, just give me as straight as you've got. happy

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#4676771 - 02/24/18 05:24 PM Re: Carbon buildup on Toyota pistons and rings [Re: Cujet]
Trav Offline


Registered: 11/20/06
Posts: 18893
Loc: MA, Mittelfranken.de
I guess that why we don't see any dino dexos oils. +1 on synthetic being a must in modern engines, dino should be reserved for pre emission control engines only IMO.
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#4676783 - 02/24/18 05:42 PM Re: Carbon buildup on Toyota pistons and rings [Re: Cujet]
tig1 Offline


Registered: 01/03/09
Posts: 13661
Loc: Illinois
Cujet,
Thanks for posting this. For those that say varnish is harmless(mostly caused by oil oxidation) are wrong in some cases, because when oil oxidizes ring coking can occur as seen in video. The varnished head looked fare with some varnish, but the rings were coked(I have seen much worse) which leads to oil blow by and oil consumption. A quality synthetic will prevent this. In 40 years of synthetic oil use at 10K OCIs I have never had this problem.
_________________________
2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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#4676788 - 02/24/18 05:49 PM Re: Carbon buildup on Toyota pistons and rings [Re: tig1]
krismoriah72 Offline


Registered: 02/16/09
Posts: 1518
Loc: wv
I thought this was a manufacturing defect. They extended the warranty because they knew they used defective parts.

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#4676798 - 02/24/18 05:55 PM Re: Carbon buildup on Toyota pistons and rings [Re: Cujet]
barkingspider Offline


Registered: 12/22/13
Posts: 2049
Loc: socal
Why are there tons of vehicles, especially Toyota’s that have over 200k miles on original motors using nothing but conventional oil?
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#4676804 - 02/24/18 06:02 PM Re: Carbon buildup on Toyota pistons and rings [Re: barkingspider]
tig1 Offline


Registered: 01/03/09
Posts: 13661
Loc: Illinois
Originally Posted By: barkingspider
Why are there tons of vehicles, especially Toyota’s that have over 200k miles on original motors using nothing but conventional oil?


Ring and piston design and shorter OCIs. Perhaps


Edited by tig1 (02/24/18 06:03 PM)
_________________________
2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
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#4676828 - 02/24/18 06:30 PM Re: Carbon buildup on Toyota pistons and rings [Re: Cujet]
JLTD Online   shocked


Registered: 12/15/17
Posts: 676
Loc: US
Subbed for when I have the time to watch.
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His: 2015 4Runner SR5 1GR-FE 39k, Amsoil OE 5w20/Wix
Testing vs Amsoil OE 5w30...then longer OCI on SS

Hers: 2008 Jeep Liberty 135k, Amsoil SS 5w30/Amsoil, minimum 10k oci

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#4676867 - 02/24/18 07:11 PM Re: Carbon buildup on Toyota pistons and rings [Re: Cujet]
philipp10 Offline


Registered: 05/09/14
Posts: 1179
Loc: Minnesota
I have this motor. At around 60k I noticed the oil consumption went way up. I was using about a quart every 1200 miles. The warranty extension states I must use MORE than a quart every 1200 miles. The warranty extension is for 10 years. I happened to switch to synthetic around that time, due to living in Minnesota and realizing I would improve winter starting. From 60k to about 90 k miles I have been dumping in a quart every 1200 miles. In the last 6 months though, it seems the oil consumption has dropped. I am unsure if the synthetic did it, but it is better. I think around a quart every 2000. Maybe in a design where the oil is hanging up in the oil control rings (too small holes), synthetic flows better. I don't know.

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#4676871 - 02/24/18 07:18 PM Re: Carbon buildup on Toyota pistons and rings [Re: Cujet]
MONKEYMAN Offline


Registered: 06/24/04
Posts: 2231
Loc: St. Louis
Is it poor design or the oil? With my S-Series Saturn design was the issue. Synthetic oil helped reduce oil consumption if used early.

I feel a little confused. Some say any oil that meets spec will be fine in my Elantra. Trav just said synthetic oil is a must in modern engines. I have high regard for Trav.

Experience tells me it is easier to keep and engine clean with synthetic oil than clean an engine once rings are coked. On the other hand Hyundai does not require synthetic oil.

My head is hurting now. duh
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#4676882 - 02/24/18 07:29 PM Re: Carbon buildup on Toyota pistons and rings [Re: Cujet]
incognito_2u Offline


Registered: 12/15/16
Posts: 113
Loc: Long Island, N.Y.
So, As you can see, The 1999 Corolla that's in my sig is a car that's notorious for burning Oil......a product of not enough drain holes or too small a drain hole by the Piston oil control ring groove that eventually gets "clogged" and creates an "oil Burning" condition. Now the car in question was purchased 10 months ago, used, from a little old lady (literally) who had the car serviced by a reputable Service center in the area that has a great reputation of doing quality Work for a fair price.....upon looking at the service records of the vehicle (specifically the Oil Change records), the Oil used was Bulk dino Pennzoil 5W30 with a Pennzoil Oil filter, approximately every 5000miles/6 months. What I have done to possibly prevent this from being an issue was to give it an initial "Kreen" piston soak and to change the Oil to 5W30 Pennzoil Ultra Platinum with an Fram Ultra Filter.
I truly believe that the steps I took to cure/prevent the oil burning issue have worked!! LOL
So far, 4 thousand miles on the car since purchase and it hasn't burned a drop of oil......


Edited by incognito_2u (02/24/18 07:34 PM)
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2006 Jeep Commander 3.7 V6 -108k (PUP/XG3600)
2006 Toyota Corolla 1.8 VVTi -76k (PPHM/XG3600)
1999 Toyota Corolla 1.8 -77k (PUP/XG4386)

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#4676912 - 02/24/18 07:52 PM Re: Carbon buildup on Toyota pistons and rings [Re: MONKEYMAN]
Silk Online   content


Registered: 07/26/03
Posts: 4563
Loc: New Zealand
Originally Posted By: MONKEYMAN
Is it poor design or the oil?


If it was the oil, then every engine would be having problems if they weren't using the most expensive oil on the shelf. Obviously a problem specific to these engines. And there are a lot of engines out there with specific problems, on a lot of them using the wrong oil can cause the problem...but it's not the oil that's the problem, it's engine design.
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1987 BMW R65 - Penrite V Twin 20/50
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.

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#4676928 - 02/24/18 08:02 PM Re: Carbon buildup on Toyota pistons and rings [Re: Cujet]
ARB1977 Offline


Registered: 06/12/05
Posts: 5168
Loc: North Texas

Here’s the top of one of my pistons on my 2015 Tacoma. No oil burning. Going to try Amsoil PI every 5K till 30K when it’s time to change plugs again and hopefully it cleans it up.
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2015 Tacoma 4.0L 60K (as of 02/23/18)
Amsoil SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
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#4676983 - 02/24/18 09:06 PM Re: Carbon buildup on Toyota pistons and rings [Re: tig1]
CR94 Offline


Registered: 03/20/16
Posts: 1120
Loc: Western S.C. since 1996
Originally Posted By: tig1
... In 40 years of synthetic oil use at 10K OCIs I have never had this problem.
I've never heard of a reasonably maintained Ford with this problem, regardless of oil type.
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2011 Toyota Prius now at 88K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
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#4676999 - 02/24/18 09:19 PM Re: Carbon buildup on Toyota pistons and rings [Re: Cujet]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
skip to 37:00

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