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2018 Outbacks, Grey Premium & Silver Limited
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Discussion Starter #21
Found this video at Jalopnik. Real good primer on GDI, I learned a lot. And around the 16 minute mark, he gets into NOACK, so this is somewhat on Kevin's topic.
Thank you, not to let this stray too far off topic but I surmise that the great motivation for direct injection among current automakers is emissions compliance. As far as oil goes a lot of what gets engineered to not come out the tailpipe ends up in the crankcase, which is why I strongly recommend sticking to Subaru's 6000 mile oil change interval for all Subaru direct injection engines if not shortening the interval on your own terms.
 

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2015 Outback 2.5i Limited, Ice Silver/Black
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Thank you, not to let this stray too far off topic but I surmise that the great motivation for direct injection among current automakers is emissions compliance. As far as oil goes a lot of what gets engineered to not come out the tailpipe ends up in the crankcase, which is why I strongly recommend sticking to Subaru's 6000 mile oil change interval for all Subaru direct injection engines if not shortening the interval on your own terms.
Between oil dilution, coked up valves, and cooked injector tips it just sounds like a bad deal all around.
And don't get me started on Infiniti's variable compression, dual DI, turbo six-pot... Sorry, back to YOUR thread! :)

 

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2016 Subaru Outback 2.5L 89,000 miles

Out: Whatever the dealer put in last time, Subaru oil filter

In: Castrol EDGE 0W-20 Advanced Full Synthetic (Walmart) WIX 57055 (RockAuto)

Are Subarus supposed to have crush or copper washers on the oil drain plug? There was not one on when I just changed the oil, previous change was done at the Subaru dealer.

Also is this little 'notch' a drain? There was a lot of debris around the filter before I changed it, and I did not think to clean out that gutter before taking the filter off. Hoping if any debris got flushed when I took the filter out it has a place to go other than into the engine.

The below pic I stole and added the arrow, mine was much dirtier
487284

 

SubaruOutback.org Founder
2018 Outbacks, Grey Premium & Silver Limited
Joined
4,874 Posts
Discussion Starter #24
Between oil dilution, coked up valves, and cooked injector tips it just sounds like a bad deal all around.
And don't get me started on Infiniti's variable compression, dual DI, turbo six-pot... Sorry, back to YOUR thread! :)

The more I have been reading up on carbon soot and its proclivity to agglomerate, like say on intake valves or in a crankcase or in an oil filter, the more I believe that using an oil filter with depth media is the only meaningful solution anyone can do for a reasonable cost and effort.

Unless you want to go with a full on bypass filtration system and pay for it as well as put in the work to get it to work for you, the Fram Ultra/Titanium is the only spin on can oil filter to be using on any direct injection engine in which it is applicable.

2016 Subaru Outback 2.5L 89,000 miles

Out: Whatever the dealer put in last time, Subaru oil filter

In: Castrol EDGE 0W-20 Advanced Full Synthetic (Walmart) WIX 57055 (RockAuto)

Are Subarus supposed to have crush or copper washers on the oil drain plug? There was not one on when I just changed the oil, previous change was done at the Subaru dealer.

Also is this little 'notch' a drain? There was a lot of debris around the filter before I changed it, and I did not think to clean out that gutter before taking the filter off. Hoping if any debris got flushed when I took the filter out it has a place to go other than into the engine.

The below pic I stole and added the arrow, mine was much dirtier
View attachment 487284
Yes use a crush washer, I consider it negligent if a dealership performs an oil change without replacing the crush washer.

Also I don't know about the notch in the oil filter area but I always clean that area up after every oil filter replacement.
 

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2012 Outback Ltd 3.6r
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Anything in the notched area within the filter area, would flow into the filter, so while I clean it on my wife's car, it isn't necessary to go overboard and try to suck out everything in it. - You just don't want it actually clogged, although at the pressure mos Subaru engines operate, doubt anything short of a ball bearing or pouring in some sealer/concrete could possibly clog it.

The 'filtered' oil is returned to the engine through the center, for those who didn't realize or think about it. (Probably common knowledge, but somebody unfamiliar with how an oil filter works, might not know the flow pattern).
 
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