Used Oil Analysis : 2010 3 door Yaris : 4,341 mis. on oil and 16,611 miles on engine

[Hershey]

PENNZOIL conventional 5w-30 ( SN/GF-5 ) , TOYOTA oil filter 90915-YZZF2 . Air filter is factory installed . Replaced with SHELL full synthetic 5w-30 ( SN/GF-5 ) and TOYO oil filter . Previous 2 O.C.s were SHELL conventional 5w-30 ( SM/GF-4 ) and TOYO oil filters . Plan to get U.O.A.s every 35,000 mis. or so to check for possible coolant , engine wear , and oil performance . We're thinking of getting another analysis for the '08 sedan that had head cylinder gasket replaced . Will likely post that in near future .

[severous01]

that's a first oil change, let's see where you're at next change. there's gonna be other stuff in there than a normal engine from assembly and wearing down sharp edges. i'd like to check mine, but i'm not gonna pay for it...i dont know how much it is, but it's not worth it to me.

[Hershey]

That's your choice not to. I just thought other members would like to know how the 1NZFE engine breaks in over time.

[craigq]

Thanks for doing the oil analysis !

I would attach a compiled 1NZFE UOA listing (mostly from BITOG) in CSV format but it now exceeds the attachment size limit of the forum interface.

[Hershey]

Your welcome.

[craigq]

UOA's up to the end of 2006

[craigq]

UOA's 2007-to-present.

[severous01]

dont get me wrong, i'm interested. i assume you're using natural oil? penzoil 5-30?

[Hershey]

That's the regular Pennzoil 5w-30 in the yellow bottle that's SN/GF-5.

[R2D2]

Hey Hershey thanks for posting.

Craigq-you are the man! Thanks a lot for those compilations, that is awesome!

In the latter set the Schaeffer's and RLI reports were mine.

The last UOA I did was the Dyson/RLI 0W-20. I am very proud of that report. Note the total engine miles. The car only had 5k on it when that oil was installed so the aggressive break in strategy I employed must have worked. Also I should note the Dyson test includes larger particles than the other labs (up to 15 microns)

Not bad for 20 wt veggie oil!

I've got some Castrol Edge I'm going to do a run on and get another Dyson done on it. If you guys are interested I'll post it here.

Thanks again both of you for sharing that data here!

R2

[PhotoDu.de]

Thanks for the UOA. What happened with the viscosity?
I'd love to see a UOA of somebody with a older and high mileage 1NZ-FE (ie 2000 Echo) to see what I can expect from my car in the future.

[Hershey]

" I've got some Castrol Edge I'm going to do a run on and get another Dyson done on it. If you guys are interested I'll post it here. "

That's fine . Be easier to monitor others YARII ( 1NZ-FE ) and possibly those of the NZ family ( Prius , 1.3Ltr. , etc. ) .

" Thanks again both of you for sharing that data here! "

Welcome . We'll likely post another in a month or so for the 2008 that had the H.C.G. replaced at 23,747 mis. . They used the black F.I.P.G. ( Form In Place Gasket ) sealant for the timing chain and other areas . Will be interesting to see the results after the fix . It'll be past 30,000 miles in a few days . Have used a few short fills of SHELL conventional 5w-30 ( SM/GF-4 ) for flushes after the H.C.G. replacement and the U.O.A. oil will be PENNZOIL Y.B. conventional 5w-30 ( SN/GF-5 ) . TOYO 90915-YZZF2 used for all O.C.s along with new TOYO air filter installed 9/18/2010 at 24,359 miles . Do all oil changes myself .

[Hershey]

" I'd love to see a UOA of somebody with a older and high mileage 1NZ-FE (ie 2000 Echo) to see what I can expect from my car in the future. "

Got your wish , but for a 2004 ECHO with 83,313 miles . Here it is , http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2222922#Post2222922 . Enjoy .

[Hershey]

" UOA's up to the end of 2006 "

Thanks .

[Hershey]

" UOA's 2007-to-present. "

Thanks again . Out of breath .

[Hershey]

" What happened with the viscosity? "

This seems to be fairly common for these engines from the other U.O.A.s I've seen . Including Prius ( 1.5Ltr.) . Fuel dilution is the likely culprit from others conclusion . Thinking of getting a U.O.A. of the 2010 3 door with recent fill of the SHELL full synthetic 5w-30 ( SN/GF-5 ) and Toyo oil filter to see if there's less shear than the PENNZOIL Y.B. conventional 5w-30 ( SN/GF-5 ) . That won't be for 6 months or the nearing of 5,000 miles ( warranty ) , whichever one comes first .

[PhotoDu.de]

" I'd love to see a UOA of somebody with a older and high mileage 1NZ-FE (ie 2000 Echo) to see what I can expect from my car in the future. "

Got your wish , but for a 2004 ECHO with 83,313 miles . Here it is , http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2222922#Post2222922 . Enjoy .

Thanks!

[Hershey]

Here's test results for major manufacturers conventional 5w-30 , S.M./GF-4 motor oils , http://www.pqiamerica.com/testresults3a.html . Don't think they've got to the S.N/GF-5 oils as of yet . Hopefully soon . You'll notice the SHELL conventional is 226 for MOLY , the U.O.A. for the 2010 YARIS showed 219 for the PENNZOIL Y.B. 5w-30 ( SN/GF-5) with 2 previous fills of the SHELL conventional 5w-30 , SM/GF-4 . So , tells of about same MOLY content for SHELL SM/GF-4 and PENNZOIL SN/GF-5 oils . Imagine the SHELL SN/GF-5 would be the same .

[Hershey]

" Thanks for the UOA. What happened with the viscosity? "

The timing chain has been blamed as a culprit as well . Right , Craigq ? :wink:

[Hershey]

Here's the report for the 2008 sedan to compare with the 2010 3 door U.O.A..

[Steveh27]

I've got a question re; oil changes in my 2010. I bought it 6 months old with 4,600 miles on it. The dealer changed the oil then. I had the second oil change done 7 months later with 3,500 miles on it. The service guy said the oil looked brand new & almost kept it for his truck! lol. So now I'm approaching 6 months again, but only have 1,800 miles on it. Sure seems like a waste to do it now, but I want to keep the warranty valid. This 18 month service (I have 9,800 miles on the car total now) would also be the time the manual says to inspect other items. A Toyota service manager said they don't worry about the time interval like they do the mileage. I know the manual says do it every 6 months no matter the mileage, but... I'm betting most would say do it every 6 months until out of warranty then do it every 5,000 miles which is about 11 months for me. The oil in it now is conventional Shell 5w-30.

[R2D2]

Toyota says 6 months so if I were worried at all about warranty I'd do it then. The dealer isn't wrong by not being overly worried about the time of the oil change interval BUT it is there for a reason-as a catch all. More on this below.

Here is my opinion.

If you put on 1800 miles in 6 months, then presumably you

A. Do a lot of short trips.

B. Use your car infrequently for longer/moderate length trips.


If A is true a good bit of the time, in MI where it is a least moderately cold a good bit of the year I would be changing at 6 months regardless. It simply takes longer in cold environments for the engine to reach operating temp and this adds fuel dilution due to fuel enrichment during warm up and provides less time at normal temp to cook off fuel and moisture. This combination can deplete the oils ability to neutralize acid much more quickly. This makes an oil more likely to allow the formation of sludge, deposits and corrosion of engine components. This is why the 6 month catch all exists-for the guy in Alaska who drives his car one mile to work everyday.

If B is more the case for you and the vast majority of your trips are 10 miles or longer you could go longer. I would recommend an oil analysis that includes Total Base Number (or TBN, a measure of an oils remaining acid neutralizing capability) to be sure you're not over extending. You get the added benefit also of checking for other issues that may exist, such as coolant ingress or an intake air leak. However, in the case of a Yaris it clearly is not as much a cost/benefit winner as it may be in other applications.

I extend oil changes in the fleet of trucks at work out to 3 years in some cases. However they have much larger sumps (up to 7.5 gallons), are stored indoors, and almost always get brought up to temp when they are out. All those decisions are based on trended oil analysis data. I understand your frustration with waste also. I have a unit that must have its oil changed every 6 months for warranty and I have to drain out 6.75 gals of perfectly good oil!

Not sure if this will help your decision or muddy the water further. The honest truth is NO ONE (not even Toyota) knows if your oil change habits are adequate for your particular Yaris in your environment without oil analysis data. However, they have to come up with a recommendation that works at least moderately well for everyone.

R2

[PatiWenlon]

Craigq-you are the man! Thanks a lot for those compilations, that is awesome!