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2015 Forester XT QSUD D1G2 #4913012 11/02/18 05:23 PM
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jbutch Offline OP
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Hey guys!

So after using the PP and reading it might cause a reaction with the oil cooler and resulting in high copper in the oil, I decided to try a new oil.

This time around, I went with the new d1g2 formula of qsud and I am happy to report that copper is way down!

I ran a can of CRC GDI cleaner, that's why it's mentioned in the comments.

I went with low kms this time around to monitor copper, but this fill I will push it to 6000-7000 kms.

OilReports-1.jpg
Last edited by jbutch; 11/02/18 05:25 PM.

2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4913023 11/02/18 05:35 PM
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Fuel dilution might be higher than the estimated 0.8% Blackstone says it is.
Low flashpoint & low KV100 indicated a thinning that may not all be VII permanent shearing.
Looks like your oil has always gotten to be thin.
Iron looks great though. This engines tolerates the thinning quite well.
My recommendation: Use M1 AFE 0w30 in the coldest 6 months of the year, and M1 ESP 5w30 (thicker HTHS for that turbo) in the hottest 6 months. Matches Canadian seasonal patterns.

Re: 2015 Forester XT QSUD D1G2 [Re: oil_film_movies] #4913025 11/02/18 05:38 PM
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Originally Posted by oil_film_movies
Fuel dilution might be higher than the estimated 0.8% Blackstone says it is.
Low flashpoint & low KV100 indicated a thinning that may not all be VII permanent shearing.
Looks like your oil has always gotten to be thin.
Iron looks great though. This engines tolerates the thinning quite well.
My recommendation: Use M1 AFE 0w30 in the coldest 6 months of the year, and M1 ESP 5w30 (thicker HTHS for that turbo) in the hottest 6 months. Matches Canadian seasonal patterns.



Thanks for the recommendation, I might try it, though M1 is considerably more expensive up north.

From what I seen, all SN oil brands shears a lot in this engine....


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4913039 11/02/18 05:49 PM
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Seems your engine likes the QSUD.
Thanks for sharing. thumbsup


Pete.

97 Ford Expl.Sport 4.0 ohv 4wd 5spd 188k miles
03 Saturn Ion 2.2 L4 5spd 239k miles
PP, PPHM 50/50 5w30

Currently under the influence of oil shocked2

Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4913086 11/02/18 06:40 PM
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Originally Posted by oil_film_movies
Fuel dilution might be higher than the estimated 0.8% Blackstone says it is.
Low flashpoint & low KV100 indicated a thinning that may not all be VII permanent shearing.
Looks like your oil has always gotten to be thin.
Iron looks great though. This engines tolerates the thinning quite well.
My recommendation: Use M1 AFE 0w30 in the coldest 6 months of the year, and M1 ESP 5w30 (thicker HTHS for that turbo) in the hottest 6 months. Matches Canadian seasonal patterns.
It's easier to just run 0W40 year round for me and I live in Southern Ontario. If OP lives in an actual cold part of Canada they might want a 0Wx for when they need to tow their skidoo to their mechanic's igloo.
Originally Posted by jbutch
Thanks for the recommendation, I might try it, though M1 is considerably more expensive up north.

From what I seen, all SN oil brands shears a lot in this engine....
M1 or Edge are on sale all the time for under $30 at Canadian Tire. T6 also goes on sale from time to time. There was a recent M1 sale where it was $25 a jug before tax at CT, that's an insane price!


03 Jetta AWP/09A 210k kms
Edge 0W40 + Mann 719/30
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4913484 11/03/18 10:07 AM
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Is this 5W30?


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Quaker State Ultimate Durability 10W30

Re: 2015 Forester XT QSUD D1G2 [Re: aquariuscsm] #4913604 11/03/18 12:22 PM
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Originally Posted by aquariuscsm
Is this 5W30?



It is.

It has sheared down to a 20 grade though.

Every oil I have tried in this engine sheared down to a 20 grade.


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4917394 11/07/18 09:53 AM
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Originally Posted by jbutch
Originally Posted by aquariuscsm
Is this 5W30?



It is.

It has sheared down to a 20 grade though.

Every oil I have tried in this engine sheared down to a 20 grade.

ACEA C3 5W30's stay in grade. smile2

I'm not completely convinced that the high copper with PP is from the oil cooler, only because WRX's without oil coolers also show high copper with PP. shrug OAI UOA's using GC to test fuel usually show around 2-4% with some cars showing even higher dilution.

I'm looking forward to Ascent uoa's since it will be the first Subaru turbo to spec a 20 grade. But yeah, Subaru DIT's generally do well on oil with an operating viscosity of a 20 grade (in terms of uoa wear metals) as long as the car is stock.


'04 Subaru Forester 2.5XT
Castrol Edge 0W-40
Re: 2015 Forester XT QSUD D1G2 [Re: bluesubie] #4918749 11/08/18 07:35 PM
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Originally Posted by bluesubie
Originally Posted by jbutch
Originally Posted by aquariuscsm
Is this 5W30?



It is.

It has sheared down to a 20 grade though.

Every oil I have tried in this engine sheared down to a 20 grade.

ACEA C3 5W30's stay in grade. smile2

I'm not completely convinced that the high copper with PP is from the oil cooler, only because WRX's without oil coolers also show high copper with PP. shrug OAI UOA's using GC to test fuel usually show around 2-4% with some cars showing even higher dilution.

I'm looking forward to Ascent uoa's since it will be the first Subaru turbo to spec a 20 grade. But yeah, Subaru DIT's generally do well on oil with an operating viscosity of a 20 grade (in terms of uoa wear metals) as long as the car is stock.


Still under warranty so gotta stick with SN at the moment.

Wrx does not have an oil cooler?


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4922985 11/13/18 12:02 PM
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Originally Posted by jbutch
Originally Posted by bluesubie
Originally Posted by jbutch
Originally Posted by aquariuscsm
Is this 5W30?



It is.

It has sheared down to a 20 grade though.

Every oil I have tried in this engine sheared down to a 20 grade.

ACEA C3 5W30's stay in grade. smile2

I'm not completely convinced that the high copper with PP is from the oil cooler, only because WRX's without oil coolers also show high copper with PP. shrug OAI UOA's using GC to test fuel usually show around 2-4% with some cars showing even higher dilution.

I'm looking forward to Ascent uoa's since it will be the first Subaru turbo to spec a 20 grade. But yeah, Subaru DIT's generally do well on oil with an operating viscosity of a 20 grade (in terms of uoa wear metals) as long as the car is stock.


Still under warranty so gotta stick with SN at the moment.

Wrx does not have an oil cooler?

They dropped it several years ago.


'04 Subaru Forester 2.5XT
Castrol Edge 0W-40
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4923760 11/14/18 08:10 AM
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I think the 2015 and up WRX (not the STI) has one with the new FA20DIT engine.

See this part here, it lists that it fits both the forester xt and wrx https://parts.subaru.com/p/Subaru__/OIL-COOLER-COMPLETE/60014852/21311AA180.html


Last edited by jbutch; 11/14/18 08:10 AM.

2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4924370 11/14/18 05:41 PM
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Thanks! Looks like it was missing between MY2008 and MY2014.

Back to my original comment, other than in a new engine typically you’ll see higher copper from oil cooler leaching when running high ZDDP oil.

https://www.machinerylubrication.com/Read/646/copper-diesel-engine-oil

Would be interesting to have Terry Dyson’s comments on this but I don’t know of any Subaru DIT owners that have used him that ran PP.

Last edited by bluesubie; 11/14/18 06:09 PM.

'04 Subaru Forester 2.5XT
Castrol Edge 0W-40
Re: 2015 Forester XT QSUD D1G2 [Re: bluesubie] #4924962 11/15/18 10:12 AM
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Originally Posted by bluesubie
Thanks! Looks like it was missing between MY2008 and MY2014.

Back to my original comment, other than in a new engine typically you’ll see higher copper from oil cooler leaching when running high ZDDP oil.

https://www.machinerylubrication.com/Read/646/copper-diesel-engine-oil

Would be interesting to have Terry Dyson’s comments on this but I don’t know of any Subaru DIT owners that have used him that ran PP.


Interesting read!

It might be harmless but I was really relieved when I saw the drastic drop in copper from switching from PP to QSUD, haha

I heard about Terry Dyson and it would be really interesting to know his opinion on why high copper could be caused by a certain oil.

Also if you look at the very first UOA in my report there was already high copper and the oil wasn't PP, it was Mobil Super 3000. So It'S not only PP that causes high copper.


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4925205 11/15/18 02:53 PM
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Originally Posted by jbutch
Originally Posted by aquariuscsm
Is this 5W30?



It is.

It has sheared down to a 20 grade though.

Every oil I have tried in this engine sheared down to a 20 grade.



And when the engine was tested the rest oil sheerd yet the manufacturer deemed this acceptable.


make the inside of your engine oil cap white.
don't use.
Re: 2015 Forester XT QSUD D1G2 [Re: dave1251] #4925450 11/15/18 07:42 PM
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jbutch Offline OP
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Originally Posted by dave1251
Originally Posted by jbutch
Originally Posted by aquariuscsm
Is this 5W30?



It is.

It has sheared down to a 20 grade though.

Every oil I have tried in this engine sheared down to a 20 grade.



And when the engine was tested the rest oil sheerd yet the manufacturer deemed this acceptable.


The FA20 (non turbo) in the BRZ requires 0w-20, so maybe they expect the oil to sheardown a bit but is acceptable?


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: bluesubie] #4963476 12/28/18 02:37 PM
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Originally Posted by bluesubie
Thanks! Looks like it was missing between MY2008 and MY2014.

Back to my original comment, other than in a new engine typically you’ll see higher copper from oil cooler leaching when running high ZDDP oil.

https://www.machinerylubrication.com/Read/646/copper-diesel-engine-oil

Would be interesting to have Terry Dyson’s comments on this but I don’t know of any Subaru DIT owners that have used him that ran PP.

This is why I am not concerned about using a 8+ cSt. oil in the FA engine. I intend to get Terry to look at my UOA after a couple analysis on the QSUD. Seems like a great oil.


Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4968991 01/03/19 05:43 PM
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Here is an update, I extended to 7000km and the sample was still great.

Aluminum is a bit high, but other than that, its pretty darn good.

Attached PDF document
OilReports.pdf (56.66 KB, 32 downloads)

2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4969007 01/03/19 06:04 PM
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jbutch Offline OP
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Re upload as jpeg.

OilReports(2)-page-001.jpg

2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4969040 01/03/19 06:45 PM
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Nothing wrong with that aluminum number. In fact it’s lower if you figure it as ppm per 1000km

Good report.


2017 Mazda CX5
Havoline Pro DS 0w20
Roki OEM filter.
Re: 2015 Forester XT QSUD D1G2 [Re: PimTac] #4969042 01/03/19 06:48 PM
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Originally Posted by PimTac
Nothing wrong with that aluminum number. In fact it’s lower if you figure it as ppm per 1000km

Good report.


Yeah, I'm glad the copper issue is finally resolved.

QSUD is a really good oil, underated imo.


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #4971673 01/06/19 08:19 PM
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Looks great. The FA engine is one of the best engines ever developed. Hang on to it!! It was a joint development by Subaru/Toyota in 2012 and in the unturbo state was 197HP and ffinally 205..Unturboed and again used 20 wt oil. The Turbo engine has won Wards best engines Three times since 2013. I was not ready to buy a 2018 Forester but since this was the last year for it in the Forester I had no choice. I only have 6800 miles on mine. I will do a UOA in maybe 6 months.

I wish they put the unturboed version in the Crosstrek. I might have bought it!

Last edited by Al; 01/06/19 08:21 PM.

Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5002660 02/06/19 07:53 AM
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Not sure how I missed this thread, I have a '14 FXT and these UOAs are very interesting to me.
So weird about the high copper with the PP! There's gotta be a reasonable explanation for that.
Probably not worth worrying about too much as this engine has an oil cooler (which I think jbutch informed me about in another thread, I had no idea), but still strange.

jbutch, I hope your FXT has the updated CVT design that was introduced during the 2015MY.
Mine had a major CVT repair done at 80kmiles, at which point I learned that Subaru added a CVT fluid filter to later models that cannot be retrofitted to older cars.
I'm not sure if the lack of a filter could have contributed to my tranny starting to fail, but I did learn during the repair process that the same dealer put the wrong CVT fluid in it at 60kmiles.
I called to make sure they used the high torque CVT fluid after the repair and I was told, "Don't worry, the fluid we put in was just as green as what came out when we took the tranny apart."
I replied that that sounded weird to me as I thought the high torque fluid was orange, but as long as they were sure of what they were doing I was happy.
About 15 minutes later, the mechanic himself called me and told me to bring the car back ASAP...they finally figured out that they had used the wrong stuff both times.


2014 Forester XT, 105000 miles
Last Change;
PP 5w30 d1G2
Tokyo Roki 15208AA170 filter
Re: 2015 Forester XT QSUD D1G2 [Re: Virtus_Probi] #5002744 02/06/19 09:17 AM
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Originally Posted by Virtus_Probi
Not sure how I missed this thread, I have a '14 FXT and these UOAs are very interesting to me.
So weird about the high copper with the PP! There's gotta be a reasonable explanation for that.
Probably not worth worrying about too much as this engine has an oil cooler (which I think jbutch informed me about in another thread, I had no idea), but still strange.

jbutch, I hope your FXT has the updated CVT design that was introduced during the 2015MY.
Mine had a major CVT repair done at 80kmiles, at which point I learned that Subaru added a CVT fluid filter to later models that cannot be retrofitted to older cars.
I'm not sure if the lack of a filter could have contributed to my tranny starting to fail, but I did learn during the repair process that the same dealer put the wrong CVT fluid in it at 60kmiles.
I called to make sure they used the high torque CVT fluid after the repair and I was told, "Don't worry, the fluid we put in was just as green as what came out when we took the tranny apart."
I replied that that sounded weird to me as I thought the high torque fluid was orange, but as long as they were sure of what they were doing I was happy.
About 15 minutes later, the mechanic himself called me and told me to bring the car back ASAP...they finally figured out that they had used the wrong stuff both times.


Yeah, I asked BS if they had other samples from Pennzoil and the same engine cross referenced with high copper and I was replied there was a handful.

I checked this and it seems I have the updated CVT according to my VIN.

I plan to change the CVT fluid at the dealer at 60k miles and I will insist that they put the right fluid in.

Last edited by jbutch; 02/06/19 09:18 AM.

2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5004604 02/08/19 08:10 AM
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Originally Posted by jbutch

Yeah, I asked BS if they had other samples from Pennzoil and the same engine cross referenced with high copper and I was replied there was a handful.
I checked this and it seems I have the updated CVT according to my VIN.
I plan to change the CVT fluid at the dealer at 60k miles and I will insist that they put the right fluid in.

I think the main issue is that the FXTs are pretty rare and many of the techs probably just think Forester=0W20, regular CVT fluid, etc.
It's probably going to get even worse now that the FXT has been discontinued.
One of the reasons I started changing my own oil was that I kept getting the car back from the dealer with paperwork that said they put 0W20 in it and I would then be assured that "they must have used the right oil".
I have a ways to go since my CVT fluid was changed with the repair at 80kmiles, but I have read a few DIY change descriptions and might give it a go myself.

Last edited by Virtus_Probi; 02/08/19 08:11 AM.

2014 Forester XT, 105000 miles
Last Change;
PP 5w30 d1G2
Tokyo Roki 15208AA170 filter
Re: 2015 Forester XT QSUD D1G2 [Re: Virtus_Probi] #5005768 02/09/19 01:50 PM
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Originally Posted by Virtus_Probi
Originally Posted by jbutch

Yeah, I asked BS if they had other samples from Pennzoil and the same engine cross referenced with high copper and I was replied there was a handful.
I checked this and it seems I have the updated CVT according to my VIN.
I plan to change the CVT fluid at the dealer at 60k miles and I will insist that they put the right fluid in.

I think the main issue is that the FXTs are pretty rare and many of the techs probably just think Forester=0W20, regular CVT fluid, etc.
It's probably going to get even worse now that the FXT has been discontinued.
One of the reasons I started changing my own oil was that I kept getting the car back from the dealer with paperwork that said they put 0W20 in it and I would then be assured that "they must have used the right oil".
I have a ways to go since my CVT fluid was changed with the repair at 80kmiles, but I have read a few DIY change descriptions and might give it a go myself.



If you look at the first sample on the BS report, you will see it has a signifiantly lower viscosity, I suspect they put in 0w-20 instead of 5w-30 at the dealer....


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5007710 02/11/19 09:37 AM
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Originally Posted by jbutch

If you look at the first sample on the BS report, you will see it has a signifiantly lower viscosity, I suspect they put in 0w-20 instead of 5w-30 at the dealer....

Would not be surprised one bit!!
When I called the "service advisor" on the 0W20 shown on my paperwork, I saw brief looks of surprise and fear before they slipped into damage control mode...I think surprise that somebody actually read the paperwork and fear that there was a type of Forester that didn't use 0W20 and nobody in the shop realized that.


2014 Forester XT, 105000 miles
Last Change;
PP 5w30 d1G2
Tokyo Roki 15208AA170 filter
Re: 2015 Forester XT QSUD D1G2 [Re: dave1251] #5007779 02/11/19 10:46 AM
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And when the engine was tested the rest oil sheerd yet the manufacturer deemed this acceptable.[/quote]
How is it the car manufactures can assemble $400,000.00 worth of parts into a $50,000.000 pile of junk

Re: 2015 Forester XT QSUD D1G2 [Re: CT8] #5007969 02/11/19 01:27 PM
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Originally Posted by CT8
And when the engine was tested the rest oil sheerd yet the manufacturer deemed this acceptable.

How is it the car manufactures can assemble $400,000.00 worth of parts into a $50,000.000 pile of junk[/quote]
I hope nobody has paid $50k US for an FXT unless it had been all modded up to heck for racing!
;^)


2014 Forester XT, 105000 miles
Last Change;
PP 5w30 d1G2
Tokyo Roki 15208AA170 filter
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5008493 02/12/19 03:19 AM
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Whoa whoa, PP is causing oil cooler reactions???


Cadillac CTS-V 6.2L 10w30PP
Volvo P1800 Euro L
76 Mercedes 300D Rotella T4
Series III Land Rover VWB
02 Yukon 10w30 PP
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Re: 2015 Forester XT QSUD D1G2 [Re: Gasbuggy] #5008516 02/12/19 05:50 AM
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Originally Posted by Gasbuggy
Whoa whoa, PP is causing oil cooler reactions???


It looks like it did for me in my engine for some reason. Some people says it's harmless but I don't want to take any chances.


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5009488 02/13/19 01:58 AM
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Originally Posted by jbutch
Originally Posted by Gasbuggy
Whoa whoa, PP is causing oil cooler reactions???


It looks like it did for me in my engine for some reason. Some people says it's harmless but I don't want to take any chances.



That is concerning. I just filled my CTS-V up with PP 10w30. I'll have to run a sample.


Cadillac CTS-V 6.2L 10w30PP
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Re: 2015 Forester XT QSUD D1G2 [Re: Gasbuggy] #5010024 02/13/19 02:58 PM
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Originally Posted by Gasbuggy
Originally Posted by jbutch
Originally Posted by Gasbuggy
Whoa whoa, PP is causing oil cooler reactions???


It looks like it did for me in my engine for some reason. Some people says it's harmless but I don't want to take any chances.



That is concerning. I just filled my CTS-V up with PP 10w30. I'll have to run a sample.



I'm sure you are fine, I didn't want to scare anyone saying that, PP is a good oil, it's just that in my particular engine, it's doing that, and according to forums, I'm not the only one.


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5053375 03/25/19 08:41 AM
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You guys tired of my UOA yet? I think I might be addicted...

I tried to reach 8000 km this time but we had such low temperature and I had quite a few short trips that I changed it a bit early.

Aluminum dropped back to normal but tin is up?

First time I see tin in my samples, anything to worry about?

[Linked Image]


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5053398 03/25/19 09:20 AM
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Originally Posted by jbutch
You guys tired of my UOA yet? I think I might be addicted...

I tried to reach 8000 km this time but we had such low temperature and I had quite a few short trips that I changed it a bit early.

Aluminum dropped back to normal but tin is up?

First time I see tin in my samples, anything to worry about?

[Linked Image]

Do you realize that your QS 5W30 is one of the thickest virgin oils out there....... around [email protected]?
This engine is crying for an oil brand that doesn't shear as much.But it will cost you more than $19 per jug. Take your pick..... Castrol Edge, Mobil-1, Pennzoil Platinum, Valvoline Advanced.

Last edited by Triple_Se7en; 03/25/19 09:22 AM.

19 Hyundai SantaFe 2.4GDI Castrol Edge 5w30 / NAPA Mann-Hummel filter / 6oz Liqui-Moly Treatment
04 Colorado 3.5 Castrol Edge 0W40 Euro & K&N filter
03 Malibu 3.1 QS / Valv Syn 5w30 mix Fram EG filter
Re: 2015 Forester XT QSUD D1G2 [Re: Triple_Se7en] #5053429 03/25/19 09:57 AM
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Originally Posted by Triple_Se7en
Originally Posted by jbutch
You guys tired of my UOA yet? I think I might be addicted...

I tried to reach 8000 km this time but we had such low temperature and I had quite a few short trips that I changed it a bit early.

Aluminum dropped back to normal but tin is up?

First time I see tin in my samples, anything to worry about?

[Linked Image]

Do you realize that your QS 5W30 is one of the thickest virgin oils out there....... around [email protected]?
This engine is crying for an oil brand that doesn't shear as much.But it will cost you more than $19 per jug. Take your pick..... Castrol Edge, Mobil-1, Pennzoil Platinum, Valvoline Advanced.


Both UOAs at 59k and 64k were with PP and it also sheared as much..

I think all GF5 oils will shear in this engine.


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5053522 03/25/19 11:33 AM
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Originally Posted by jbutch
You guys tired of my UOA yet? I think I might be addicted...


I'll provide a virtual uoa for half of the cost. I test fuel by ASTM OU812 and my results will be within 3% of Blackstone's. grin2

As far as all GF5 oils shearing, I believe between 2015+'s on nasioc and the DIT uoa's on the Forester forum, Pennzoil does seem to have a fair number of uoa's that shows it does stay in grade in these engines pretty regularly (not all as you've experienced). But then you get the wonky elevated copper. Of course these engines are known for high fuel dilution and I would be curious to see your fuel number tested by GC.

Presume you are keeping all oil receipts and not doing any engine/ecu mods. Hopefully the tin uptick is just uoa noise, but this is not something that you will always be able to tell with one concerning uoa. I would probably even scale back on intervals running a GF5 oil.

Last edited by bluesubie; 03/25/19 11:44 AM.

'04 Subaru Forester 2.5XT
Castrol Edge 0W-40
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5053553 03/25/19 11:50 AM
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Originally Posted by jbutch
Originally Posted by Triple_Se7en
Do you realize that your QS 5W30 is one of the thickest virgin oils out there....... around [email protected]?This engine is crying for an oil brand that doesn't shear as much.But it will cost you more than $19 per jug.
Both UOAs at 59k and 64k were with PP and it also sheared as much..I think all GF5 oils will shear in this engine.

I'd use Shell Rotella Multi-Vehicle 5w30 in this shear-dilution engine. It is SN, and 5w30, so meets Subaru's specs, if you ignore the GF-5 part which just means this oil isn't as MPG-saving. Its LSPI resistant with low levels of calcium. Lots of tough diesel engine certifications to go with the gasoline SN rating. ...
Cheap, sort of, on Walmart's website, usually ordered for pick-up in person at Walmart, not stocked there.

Last edited by oil_film_movies; 03/25/19 11:53 AM.
Re: 2015 Forester XT QSUD D1G2 [Re: CT8] #5053669 03/25/19 01:18 PM
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Originally Posted by CT8
And when the engine was tested the rest oil sheerd yet the manufacturer deemed this acceptable.

How is it the car manufactures can assemble $400,000.00 worth of parts into a $50,000.000 pile of junk[/quote]

Your post makes 0 sense.


make the inside of your engine oil cap white.
don't use.
Re: 2015 Forester XT QSUD D1G2 [Re: oil_film_movies] #5053672 03/25/19 01:19 PM
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Originally Posted by oil_film_movies
Originally Posted by jbutch
Originally Posted by Triple_Se7en
Do you realize that your QS 5W30 is one of the thickest virgin oils out there....... around [email protected]?This engine is crying for an oil brand that doesn't shear as much.But it will cost you more than $19 per jug.
Both UOAs at 59k and 64k were with PP and it also sheared as much..I think all GF5 oils will shear in this engine.

I'd use Shell Rotella Multi-Vehicle 5w30 in this shear-dilution engine. It is SN, and 5w30, so meets Subaru's specs, if you ignore the GF-5 part which just means this oil isn't as MPG-saving. Its LSPI resistant with low levels of calcium. Lots of tough diesel engine certifications to go with the gasoline SN rating. ...
Cheap, sort of, on Walmart's website, usually ordered for pick-up in person at Walmart, not stocked there.



So what motor oil shears and the sky is blue.


make the inside of your engine oil cap white.
don't use.
Re: 2015 Forester XT QSUD D1G2 [Re: oil_film_movies] #5053719 03/25/19 01:55 PM
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Originally Posted by oil_film_movies
Originally Posted by jbutch
Originally Posted by Triple_Se7en
Do you realize that your QS 5W30 is one of the thickest virgin oils out there....... around [email protected]?This engine is crying for an oil brand that doesn't shear as much.But it will cost you more than $19 per jug.
Both UOAs at 59k and 64k were with PP and it also sheared as much..I think all GF5 oils will shear in this engine.

I'd use Shell Rotella Multi-Vehicle 5w30 in this shear-dilution engine. It is SN, and 5w30, so meets Subaru's specs, if you ignore the GF-5 part which just means this oil isn't as MPG-saving. Its LSPI resistant with low levels of calcium. Lots of tough diesel engine certifications to go with the gasoline SN rating. ...
Cheap, sort of, on Walmart's website, usually ordered for pick-up in person at Walmart, not stocked there.


This looks interesting, however I do not know where to find it in Canada...


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5053770 03/25/19 02:39 PM
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Originally Posted by jbutch
This looks interesting, however I do not know where to find it in Canada...
This forum's username Garak uses Muilt-Vehicle in Canada. (2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30)

Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5054289 03/26/19 02:50 AM
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Originally Posted by jbutch
This looks interesting, however I do not know where to find it in Canada...

NAPA Canada sells it. Any Shell distributor will be able to sell it at a very attractive price. I'm not sure where you are in Canada, but Blue Wave Energy is one of the Shell distributors (full line Shell Pennzoil-Quaker State distributor) and regular pricing is pretty much what you see for Canadian Tire weekly sale prices on their synthetics.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5054375 03/26/19 07:07 AM
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Looking forward to the next UOA with the Rotella T6 MV 5w30 ! smile


If you want the job done right......do it yourself.
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5054464 03/26/19 09:06 AM
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The Amsoil XL have a good HTHS rating on it which should give you better results and it's rated for 19,000km. It's also API certified.

You can get it shipped right to your door for about the cost of shelf oil with a PC membership that gives you 25% off the website pricing and costs $25/year.

https://www.amsoil.com/lit/databulletins/g1404.pdf (Page 2 for HTHS specs)

Last edited by StevieC; 03/26/19 09:08 AM.

'18 Caravan - 40k KM - AMSOIL SS 0w20, Fram Ultra, TC-W3 500:1
'06 Santa Fe - 535k KM (Retired)

There is no such thing as "lifetime" fluids! mad
Re: 2015 Forester XT QSUD D1G2 [Re: Snagglefoot] #5055735 03/27/19 01:32 PM
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Originally Posted by Snagglefoot
Looking forward to the next UOA with the Rotella T6 MV 5w30 ! smile



It won't be for a while, I got fresh oil with only 1000km in the engine. I found the Rotella T6 5w-30 at napa for 50$.

There are two things that worries me about this oil. First it's not dexos 1 gen 2 or sn plus and the other thing is the CCS of 6200 which is quite high and we have pretty cold weather up here.


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Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5056021 03/27/19 07:08 PM
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It's working just fine for me, and we had a pretty bad February for cold starts.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: 2015 Forester XT QSUD D1G2 [Re: Garak] #5056028 03/27/19 07:19 PM
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Originally Posted by Garak
It's working just fine for me, and we had a pretty bad February for cold starts.


Thanks for the input!


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5056103 03/27/19 08:17 PM
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It was actually a bit better than the 5w-40 it replaced, but both still performed suitably in our cold. It's to be expected that a 5w-30 CK-4 or C3 or A3/B4 will not be as great in the cold weather numbers as a 5w-30 ILSAC lube.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: 2015 Forester XT QSUD D1G2 [Re: Garak] #5061700 04/02/19 09:23 AM
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Originally Posted by Garak
It was actually a bit better than the 5w-40 it replaced, but both still performed suitably in our cold. It's to be expected that a 5w-30 CK-4 or C3 or A3/B4 will not be as great in the cold weather numbers as a 5w-30 ILSAC lube.


You guys convinced me, I got a jug of Rotella MV this morning.

Now I have to wait to finish this OCI..... I might dump it early, hahaha

I just realized that the QSUD has sheared quite a lot on the last OCI, from 11.6 cst to 7.81 cst (@KV 100c)... From a thick 30 weight to a thin 20 weight.

These TGDI seems to be quite hard on the GF-5 oils.


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Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5063695 04/04/19 03:28 AM
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I still have a lot in stock here. I'll be using it for the foreseeable and then some!


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5063709 04/04/19 04:25 AM
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If a GDI engine , wouldn't a A5/B5 rated oil aid in shearing down out of grade ?


'17 Hyundai Sonata 2.4L GDI 5W30 Valvoline Advanced Syn / Fram Ultra
'10 Hyundai Elantra 2.0L 5W30 QSUD / Fram Ultra
'07 Kia Sedona 3.8L 5W30 M1 EP HM / Fram Ultra
Re: 2015 Forester XT QSUD D1G2 [Re: ChrisD46] #5063719 04/04/19 05:08 AM
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It may be more resistant, given the ACEA spec, but so will an E6, especially given the HTHS at the outset.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: 2015 Forester XT QSUD D1G2 [Re: ChrisD46] #5064272 04/04/19 02:53 PM
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Originally Posted by ChrisD46
If a GDI engine , wouldn't a A5/B5 rated oil aid in shearing down out of grade ?


Tried an A5/B5 (Pennzoil Platinum) and it also sheared down to a 20 grade.


2015 Forester XT @ 92000km
Current fill: Mobil ESP Formula 5w-30 with Fram Ultra XG7317
Re: 2015 Forester XT QSUD D1G2 [Re: jbutch] #5064296 04/04/19 03:20 PM
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How do you know the viscosity deviation was from shear and not fuel dilution?


1994 BMW 530i, 246K
1996 Honda Accord, 280K
1999 Toyota Sienna, 420K
2000 Toyota ECHO, 281K
Re: 2015 Forester XT QSUD D1G2 [Re: kschachn] #5064673 04/04/19 10:42 PM
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Originally Posted by kschachn
How do you know the viscosity deviation was from shear and not fuel dilution?



It is most likely from both, however the fuel dilution is only 0.8%(i know blackstone fuel levels can be disputed...), it wouldn't make such a drop in viscosity on it's own IMO.


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