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2017 WRX STI: Motul X-clean EFE - 5,000 miles #4784224 06/11/18 07:16 PM
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Tiir Offline OP
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Motul X-clean 5w-30 EFE fill.




2017 WRX STI - Sold
2017 ES300h - Sold

2016 Lexus GS F
Re: 2017 WRX STI: Motul X-clean EFE - 5,000 miles [Re: Tiir] #4784236 06/11/18 07:28 PM
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Copper is probably from the oil cooler. Its been seen a lot on WRX engines. The other possible source is the crank bearings, yet it just seems unlikely here.

Re: 2017 WRX STI: Motul X-clean EFE - 5,000 miles [Re: Tiir] #4784565 06/12/18 06:58 AM
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For what itís worth that is a very low iron number, down at 1 ppm/ 1000 miles. Where the other checks with the same Motul oil?

Re: 2017 WRX STI: Motul X-clean EFE - 5,000 miles [Re: Tiir] #4784694 06/12/18 09:18 AM
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"TBN is still good at 2.2. Try 7000 miles"
Crazy lab! )))))))

It's mean that TBN > TAN
necessary decrease interval to 4000 miles

Re: 2017 WRX STI: Motul X-clean EFE - 5,000 miles [Re: Gubkin] #4784713 06/12/18 09:32 AM
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kschachn Online Content
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What?

Originally Posted By: Gubkin
"TBN is still good at 2.2. Try 7000 miles"
Crazy lab! )))))))

It's mean that TBN > TAN
necessary decrease interval to 4000 miles


1994 BMW 530i, 246K
1996 Honda Accord, 280K
1999 Toyota Sienna, 420K
2000 Toyota ECHO, 284K
Re: 2017 WRX STI: Motul X-clean EFE - 5,000 miles [Re: Tiir] #4784735 06/12/18 10:00 AM
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Re: 2017 WRX STI: Motul X-clean EFE - 5,000 miles [Re: Tiir] #4784746 06/12/18 10:07 AM
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zeng Offline
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Very good metal wear rates.
Cu and (part of) Al likely comes from cooler, not bearing.
This C3 oil of TBN 7.8 drops to 2.2 over 5100 miles, which I interprete as good TBN retention.
I won't look at TAN , if any, and agree with BStone OCI could be extended further to 7000 miles or probably beyond.

Edit:The test of the pudding is in the eating, which in this case refers to (the very good) Fe wear of 5 ppm over 5100 miles.

Last edited by zeng; 06/12/18 10:12 AM.
Re: 2017 WRX STI: Motul X-clean EFE - 5,000 miles [Re: Gubkin] #4784786 06/12/18 11:10 AM
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I believe that Blackstone uses a different ASTM test than either of those (at least they used to).

https://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=221275

I doubt the OP will extend the interval very much. And probably not likely to go beyond 6k miles which is Subaru of America's recommendation unless Blackstone will cover the Powertrain Warranty. smile2

Last edited by bluesubie; 06/12/18 11:11 AM.

'20 Subaru Outback Onyx Edition XT | FF Idemitsu 0W-20
'04 Subaru Forester 2.5XT | Edge 0W-40
Re: 2017 WRX STI: Motul X-clean EFE - 5,000 miles [Re: zeng] #4784788 06/12/18 11:15 AM
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Originally Posted By: zeng
Very good metal wear rates.
Cu and (part of) Al likely comes from cooler, not bearing.
This C3 oil of TBN 7.8 drops to 2.2 over 5100 miles, which I interprete as good TBN retention.
I won't look at TAN , if any, and agree with BStone OCI could be extended further to 7000 miles or probably beyond.

Edit:The test of the pudding is in the eating, which in this case refers to (the very good) Fe wear of 5 ppm over 5100 miles.


Wear metals ppm is only a piece of the story. You will not see deposit formation in a UOA, which you get from low TBN or where TAN is higher than TBN.

Last edited by 1JZ_E46; 06/12/18 11:18 AM.

2019 Tesla Model 3 SR+
2016 Countryman S: Castrol 0W-40
Re: 2017 WRX STI: Motul X-clean EFE - 5,000 miles [Re: Gubkin] #4785143 06/12/18 06:29 PM
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What is the TAN here?


1994 BMW 530i, 246K
1996 Honda Accord, 280K
1999 Toyota Sienna, 420K
2000 Toyota ECHO, 284K
Re: 2017 WRX STI: Motul X-clean EFE - 5,000 miles [Re: 1JZ_E46] #4785163 06/12/18 06:48 PM
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Originally Posted By: 1JZ_E46
Originally Posted By: zeng
Very good metal wear rates.
Cu and (part of) Al likely comes from cooler, not bearing.
This C3 oil of TBN 7.8 drops to 2.2 over 5100 miles, which I interprete as good TBN retention.
I won't look at TAN , if any, and agree with BStone OCI could be extended further to 7000 miles or probably beyond.

Edit:The test of the pudding is in the eating, which in this case refers to (the very good) Fe wear of 5 ppm over 5100 miles.


Wear metals ppm is only a piece of the story. You will not see deposit formation in a UOA, which you get from low TBN or where TAN is higher than TBN.

Deposit formation,contents of Na,Ca,Mg etc, sludge,varnish,low TBN , high TAN,residual [email protected]*C, fuel dilution % etc are merely/strictly noises.

Re: 2017 WRX STI: Motul X-clean EFE - 5,000 miles [Re: zeng] #4789145 06/17/18 12:42 PM
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Originally Posted By: zeng
Deposit formation,contents of Na,Ca,Mg etc, sludge,varnish,low TBN , high TAN,residual [email protected]*C, fuel dilution % etc are merely/strictly noises.


Respectfully disagree. What a dense statement.


2019 Tesla Model 3 SR+
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