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Originally Posted by jbutch This very good information, thanks for posting. When I was looking for some UOAs for Rotella's multi vehicle, I came across some of your posts on nasioc and is one of the reasons I went with Rotella for my current fill. Seems like Rotella gives very similar results...

I haven't gotten around to posting these individually, but here are 60,000 miles worth of UOAs on my 2016 WRX. Here are some key points: -A couple of the samples were sent to both Blackstone (BSL) and Oil Analyzers Inc (OAI) for analysis. -Subaru OEM oil filter on each interval -Ran the factory...

Originally Posted By: davison0976 I think wear numbers look awesome, especially including autocross events. After much research I want to try M1 ESP 5w30 in my G37 next OCI. Not only it meets API SN for warranty as you had mentioned, it is an ACEA C3 oil with VW 504/507 and Porsche C30...

This is my third interval on M1 ESP 5w30, using the OEM Subaru blue filter. Mainly easy street driving, with a few autocross events. Car is still all stock engine-wise. Topped up twice (I like to keep the oil level at full), using about 0.5 qt Castrol Professional Edge OE 5w30 at one point and...

Quote: Even if they do, does it have some proven negative effects? Those much smarter than me on the Subaru forums have come to the conclusion that a less robust oil makes the motor much more susceptible to rod bearing failure. Spun rod bearings seem to be quite common on Subaru EJ motors...

Originally Posted By: Quattro Pete Just curious, why have you chosen this particular oil? I wanted an oil with good viscosity retention and an oil that meets Subaru's warranty requirements of 5w30 and API SM/SN. Most Resource Conserving 5w30s in a Subaru EJ engine tend to shear to a 20 grade...

Second interval on Mobil 1 ESP 5w30, pretty happy with how it's doing. I was planning on running it to about 6,000 miles (see previous UOA on 4/21/14), but a road trip put me over a bit. Easy street driving, 1,000 mile road trip and autocross events on this oil. OEM Subaru blue oil filter. The...

Originally Posted By: bluesubie The 2013 isn't direct injection (that comes beginning with the '15 WRX and '14 Forester XT). Again, I believe it's moreso to stick with the manual recommendation of SM/SN 5W-30. Even though we know GC is a robust oil, a dealer or SoA would likely say that 0W-30...

After taking a mid-interval sample, I changed the oil at about 7,200 mi. Subaru OEM blue filter as always. At around 4,900 mi when I took the last sample I added about a quart of oil. Mostly easy driving with a few autocross events on the interval. All the winter driving on this interval too...

I had the TAN run on the same sample and it ended up being 2.2. Hopefully it'll stay under the TBN until 7.5k.

Great, thanks for the info! Very interesting - I'll have a look.

Originally Posted By: Gokhan I should note that TBN alone is a useless determination of remaining oil life. What matters is the difference of TBN from TAN. This is especially so with Mg-based oils like certain M1 formulations, which don't neutralize the acids effectively, which means the...

Originally Posted By: bluesubie Nice! The TBN retention is pretty impressive. Here's a voa I found: http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2113520 And this is why we can't only consider the numbers in front of us. Did you sample it through the dipstick tube...

I took a mid-interval sample to see how the TBN is holding up, and I'd like to run it to the factory-recommended 7,500 mi OCI; Subaru OEM blue filter, as usual. Easy driving for the most part and lots of winter idling, a few autocross events during this interval. Code...

Originally Posted By: gpshumway Found it for you: http://content.subaru.com/mailings/2011/12/Insider/insideronline.html Though it may not be much help. It lists "0w-30 Conventional" for a 2.5i. I'd like to see a Subaru parts guy find me a 0w-30 conventional oil... Thanks for looking anyway...

Originally Posted By: gpshumway There was an official Subaru document someplace where they mentioned 0w30, if you can find it you could also use M1 AFE 0w30 in the winter. It seems to be very good stuff and I'll bet the add-pack is almost identical to ESP. Nice...I'll have to go hunting for...

Originally Posted By: bluesubie Originally Posted By: WRX12tt

Originally Posted By: actionstan Wow, I am really impressed typically you hear about turboed engines chewing oil up and spitting it out, but seems like this held up really nice on a little bit longer run. Metals seem to be coming down steadily as well. I am curious whats the max interval...

Here is my Pennzoil Ultra UOA. PU 5w30 with an OEM Subaru filter. Easy on the car while daily driving, roughly 70% highway and 30% city driving. Four autocross events on the oil (~25 runs). At ~3,500 mi I realized that I had burned some oil and topped off with about 0.6 qts. When I changed the...

Originally Posted By: Rand you might consider 5w40 or an oil temp gauge if you plan on auto-crossing significantly. looks good. I'd love to, but I want to still keep my powertrain warranty intact. Car is staying stock. 2011+ WRXs require Resource Conserving 5w30s. Originally Posted By...