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Old 03-22-2012, 09:02 AM   #1
cheezmunky
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Default 2011 WRX Shell Rotella T6 5W-40 UOA - Update: 05/27/2014

2011 WRX Ltd Hatch bought new. Switched from factory oil to Rotella T6 5W-40 at 1,100 miles. I've been very curious to see if city driving is really as severe and hard on oil as everyone (dealers) make it out to be. The majority of my driving is city driving and after the 7,600 mi oil change, Blackstone is recommending 9,000 miles. I'm going to stay at the ~7,500 mi mark to keep within my warranty. This is in flat Kansas so in hillier regions YMMV













edit: New UOA.
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Last edited by cheezmunky; 05-17-2015 at 02:41 PM. Reason: New UOA
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Old 03-22-2012, 10:05 AM   #2
kingme
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How can they recommend extending your OCI to 9K mi without a TBN?

Did you notice any change in the sound/feel of the engine as you approached 7K miles?

Looks good!
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Old 03-22-2012, 06:00 PM   #3
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Nice uoa and hopefully your wear metals will still drop a bit. Smart move sticking with a 7,500 mile interval as a maximum.

-Dennis
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Old 03-23-2012, 08:31 AM   #4
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Quote:
Originally Posted by kingme View Post
How can they recommend extending your OCI to 9K mi without a TBN?

Did you notice any change in the sound/feel of the engine as you approached 7K miles?

Looks good!
Based on similar UOAs perhaps? Not really sure. I didn't notice any changes at all with oil life. It seems to run the same whether the oil is brand new or has 7,600 miles on it.

Quote:
Originally Posted by bluesubie View Post
Nice uoa and hopefully your wear metals will still drop a bit. Smart move sticking with a 7,500 mile interval as a maximum.

-Dennis
Thanks
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Old 03-24-2012, 12:48 PM   #5
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What is the factory recommended interval? Is it not 3750 miles?

Won't this extended OCIs void your engine warranty?
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Old 03-24-2012, 02:37 PM   #6
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Quote:
Originally Posted by bangedlegacywagon97 View Post
What is the factory recommended interval? Is it not 3750 miles?

Won't this extended OCIs void your engine warranty?
thats what i would think too. i use t6 and stick with about 3500 miles.
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Old 03-24-2012, 04:50 PM   #7
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Quote:
Originally Posted by bangedlegacywagon97 View Post
What is the factory recommended interval? Is it not 3750 miles?

Won't this extended OCIs void your engine warranty?
You can't void your warranty. Read Unabomber's Manifesto.

I suspect that, if you kept thorough records of your maintenance, including regular UOAs supporting your oil quality, Subaru would not deny service.
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Old 03-25-2012, 11:45 AM   #8
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Quote:
Originally Posted by bangedlegacywagon97
What is the factory recommended interval? Is it not 3750 miles?

Won't this extended OCIs void your engine warranty?
The factory recommended interval is 7,500 miles from 2011 onwards.

-Dennis
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Old 03-25-2012, 05:22 PM   #9
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Quote:
Originally Posted by kingme View Post
How can they recommend extending your OCI to 9K mi without a TBN?

Did you notice any change in the sound/feel of the engine as you approached 7K miles?

Looks good!
It is odd that they would recommend that based on the UOA, especially considering two sentences before they state universal averages for the 2.5L turbo engines are based on 3,935 miles on the oil.
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Old 03-25-2012, 05:34 PM   #10
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As cheap as T6 is, just change it out on a religious basis. Depending on your mods and driving habits, the sooner you will need to change it. I do an oil change right at 3 or shortly after. I have a fairly heavy foot and a good amount of mods so I like to be on the safer side. Plus it gets me out of the house when I can... lol
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Old 03-26-2012, 07:25 AM   #11
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Quote:
Originally Posted by STiNemesis

It is odd that they would recommend that based on the UOA, especially considering two sentences before they state universal averages for the 2.5L turbo engines are based on 3,935 miles on the oil.
The universal averages are based on the oci for all other 2.5 uoa's that they have on file. If this was a 5W-30 that sheared to a 20 grade because of fuel dilution, Blackstone probably would have said to extend the interval. I've seen it before.

-Dennis
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Old 03-26-2012, 08:38 AM   #12
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Quote:
Originally Posted by bluesubie View Post
The universal averages are based on the oci for all other 2.5 uoa's that they have on file. If this was a 5W-30 that sheared to a 20 grade because of fuel dilution, Blackstone probably would have said to extend the interval. I've seen it before.

-Dennis
Well that is a little disconcerting. If you can't trust their recommendations I hope that you can at least trust the analysis itself.
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Old 03-26-2012, 10:04 AM   #13
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Quote:
Originally Posted by cheezmunky View Post
Well that is a little disconcerting. If you can't trust their recommendations I hope that you can at least trust the analysis itself.
That's why I post them here, so experts like bluesubie can spot problems for me .

Blackstone is for entertainment. If I was using a UOA to diagnose an engine problem I'd send my oil to Dyson.
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Old 03-26-2012, 10:36 AM   #14
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so much good oil poured out and wasted
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Old 03-26-2012, 06:02 PM   #15
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Quote:
Originally Posted by cheezmunky
Well that is a little disconcerting. If you can't trust their recommendations I hope that you can at least trust the analysis itself.
You should be familiar with an oil's additive package since any lab can make an error. I pointed out to someone over on the outback board that their RT6 additive levels looked too low. He contacted Blackstone and they admitted they made an error. A couple of pages about the results:

http://www.subaruoutback.org/forums/...engine-16.html

Blackstone says:
Amended report. The additives were indeed low, and we actually re-ran this sample three times to see what was going on. It was a calibration problem, and for that we apologize...


-Dennis
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Old 03-26-2012, 06:07 PM   #16
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Quote:
Originally Posted by kingme

That's why I post them here, so experts like bluesubie can spot problems for me ..
Oil dork, NOT expert.

-Dennis
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Old 03-28-2012, 01:08 PM   #17
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uhh, this is a turbo car. 7k?! 3750 miles is what the manual says. follow it.
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Old 03-28-2012, 02:24 PM   #18
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Quote:
Originally Posted by Nimbus09 View Post
uhh, this is a turbo car. 3750?! 7500 miles is what the manual says. follow it.


Quote:
Originally Posted by cars101.com
Subaru owner's manual maintenance schedule
> Early warranty books: the Subaru maintenance schedule note #1 reads "When the vehicle is used under severe driving conditions, the engine oil and filter should be changed every 3,750 miles or 3 3/4 months. All turbo-charges vehicles are considered to be operated under severe driving conditions"
> Later warranty books: the statement no longer includes All turbo-charges vehicles are considered to be operated under severe driving conditions.
Suggested: do the first oil change by 3mos or 3000 miles and then at least a minimum of every 7500 miles or 7.5 months afterwards. That is as long as you should go and it is strongly recommended to replace it much more frequently.
and I've got UOAs that agree that 7,500 miles is fine as well. Let's try to keep the ignorance on this site to a minimum, please.
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Old 03-28-2012, 08:33 PM   #19
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^holy carp

i forgot they switched to synthetic post 2010 (?).

yeah, i guess syn will go for longer.

i still throw dino in mine, every 3k. for 09's they recommended 3.75k intervals with dino.
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Old 03-30-2012, 08:16 AM   #20
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Yay for other people actually going to the 7,500 OCI! Looks great, thanks for posting.
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Old 03-30-2012, 10:15 AM   #21
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Quote:
Originally Posted by jonklein611 View Post
Yay for other people actually going to the 7,500 OCI! Looks great, thanks for posting.
anybody going 7500 on ANY 5w30 oil is really pushing their luck as far as im concerned

dont just blindly follow the manual....it IS wrong about a lot of things....but it gets the car through the warranty period

a used oil analysis is the only sure way to know....and id bet that a 7500 mile uoa will look bad to
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Old 03-30-2012, 10:26 AM   #22
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I push mine to 10k and doesn't afraid
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Old 04-03-2012, 07:01 AM   #23
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I've done 4 oil changes on my 2011 WRX, and it's only got 13,500 miles....
Royal purple
City driving , or highway... Doesn't matter
It's all wear and tear on the motor, it's always best to stay on top of it.....
(btw BMW recommends 15k intervals with their oil, Pft!! 0_o )
... I Never go off of what they recommend when it comes to oil changes.... Additives wear away within 3-4 months, as does lubrication, ability to transfer heat, etc.... IMO

Last edited by ANR62NV; 04-03-2012 at 07:10 AM.
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Old 04-03-2012, 07:32 AM   #24
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Quote:
Originally Posted by ANR62NV
I've done 4 oil changes on my 2011 WRX, and it's only got 13,500 miles....
Royal purple
City driving , or highway... Doesn't matter
It's all wear and tear on the motor, it's always best to stay on top of it.....
(btw BMW recommends 15k intervals with their oil, Pft!! 0_o )
... I Never go off of what they recommend when it comes to oil changes.... Additives wear away within 3-4 months, as does lubrication, ability to transfer heat, etc.... IMO
Perhaps you need to look at this uoa again, and several others, before thinking that additives wear away within 3-4 months. City driving or highway does matter and I would hope you're using Royal Purple HPS, or a 40 grade oil, because their 30 grades shear to a 20 grade as soon as you turn they key.

-Dennis
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Old 04-03-2012, 08:01 AM   #25
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@blue subie - when driving on the highway your engine is revving at a constant 25hundred to 3k RPMs
While driving city, it's a constant stop go from 900 rpm to 35hundred rpm (roughly before shifts)....
The engine is being under a generous amount of Load under both circumstances.... That's why I say it really doesn't matter ....
Besides most WRX/STi owners are spirited drivers....

About the royal purple, how do you know it becomes a "20 weight after first start up"
I mean you can't feel it , and most of us aren't chemists.... Any proof? Or just your opinion which is totally cool.... I mean that's what forums generally are, peoples opinions ....
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