another reason for the smaller oil filter design was ground clearance

apparently Subaru had to repair some customers engines after the filter had been damage by road debris

ive been using fram ph3593a (installed dry) since my warranty ran out and the car is at 180k

started using rotella 5w40 synthetic and had numerous oil tests done by blackstone which all come back clean with a recommendation to run 5k+ between oil changes

and thats my contributions... tho i dont know what to make of this relief valve business and might have to rethink my choices

 

Which M1 are you using? Usually, M1 is okay with N/A subaru motors. It gets such a bad reputation from shearing on turbo cars that it just becomes everyone hates M1. From what I've been seeing, however, M1 0w-30 is actually faring pretty well on the turbo motors, so if you're losing oil from hard driving, maybe try this out?



Again, M1 shears on turbo cars, not so much on N/A cars. If you haven't liked M1 and RT6, look into German Castrol 0w-30. Found at any AutoZone, it's the black bottle, the only 0w-30 available by Castrol (I believe) and on the back, says made in Germany.


Just a quick comparison on M1 vs Rotella T6

 

I have one of these too and LOVE it.

And the big deal is not so much how you can easy drain with no tools, it's more about how you can control the speed of the flow by slowing opening the valve. This totally eliminates the "splash" when you spin the oil plug off.

Lastly, I used to be worried about the fumoto accidentally opening, but when you play with one in person you realize why no one complains about it accidentally opening. In order for something in the road to accidentally open it (without damaging everything else causing all kinds of other damage), it would have to be a "Timo stick up the *** moment".

 

That's what most have said, the German stuff is apparently the original formula that we no longer have here. I used M1 for years on my N/A cars with no issues, so I figured it would be OK in the WRX, but it isn't. I am actually using this right now and it works great:



I buy it by the case and it comes out to about $7/qt.

 

^^^^I like all the useful data above. Thank you for offering and including insightful intellect i-club.

 

Yeah

I think thicker might be the solution too.

I also have one of these. Good stuff.

Either 5w-30 or 10w-30 depending on what's in stock at Costco.


I think a 5w-40 anything might be a good call for my car.


I had a similar situation with the PedoVan. I normally ran 5w-30 and it would go through half a quart with one tank of gas. Randomly decided to throw in some 10w-40. No more oil consumption and everything ran so much better. But that was a 14 year old Ford V6.

 

So, it took me a little while to upload these, but here are the pictures of the two filters side by side.

You can see how much larger the filter is pretty clearly. It will hold a little bit more fluid and theoretically has a larger surface area of filter media than the smaller one. Haven't cut both open to prove the latter, but the extra volume is enough for me.

 

lots of GREAT info on our Subaru filters here

Armand's Subaru Impreza Oil Filter Comparison

 

I am confident the Purolator filters have the proper Subaru bypass valve spec, but the Wix 51365 doesn't have a Subaru-spec bypass valve.

CORRECTION: Wix does have one

Wix filter (might not be the one Gancherov has), MEETS Subaru-spec
http://www.wixfilters.com/Lookup/Par...spx?Part=57712

Purolator filter, MEETS Subaru-spec
http://www.purolatorautofilters.net/...artnum=PL14460

 

IIRC, you're comparing a 2.0L filter (Purolator) to a 2.5L (Napa Gold). In general, the 2.5L filters are significantly smaller than the 2.0L filters. While both will work on the threads, that's just what the manufacturer states.

The PL14612 is the Purolator for the 2.5L if you want to compare apples to apples.

Also, as posted earlier, if you want the Napa Gold/Wix filter with the right bypass valve PSI, it's 7712/57712.

 

Yes, but only a comparison about the oil filters physical construction.

 

Which means what? Far as I can tell none of that is of any consequence. And I get to have more oil capacity.


What more do you want?

 

Don't get me wrong, there's no problem with you and your application using the PL14460, however, what you're comparing is completely irrelevant. Also, I know you like the bigger can size, and it seems that all you're looking for is can size, however, the PL14460 does not have an anti drain back valve. It's up to you to determine if this means anything to you.

Your picture is comparing apples to oranges. You're posting and comparing oil filters for different motors. The PL14460 does not fit on the 2.5L because it puts it too close to the exhaust manifold. You're saying the correct filter is better than an incorrect filter (for a 2.0L). This is pointless information and will only cause confusion for other people looking at this thread for information. The Napa Gold you chose is not even the correct filter for Subarus to use.

The bypass valve of the Napa Gold that you posted is rated 8-11 PSI. The required bypass valve PSI is ~23. If you're going to compare a Napa Gold filter, please at least use the one that is meant for our Subarus, as posted earlier 7712 (or WIX 57712).


To anyone reading this thread, I'd recommend looking at this thread:

(All Years) Subaru oil filter comparison - Subaru Forester Owners Forum

 

A physical comparison is one thing of its material make up. Another is how it works when put to use. Looking at it doesn't exactly tell you whether it works great or not. Plenty of people have done physical comparisons, since they do not have the proper equipment to test for functionality under usage.

 

Correct, it needs to pull consistently at 22-23 psi range.