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I also wonder if the jerking from the drivetrain OP feels is ignition timing correction for spark knock. I used to think it was the cvt jerkiness in them until owning my manual transmission FB Subaru and experiencing the jerkiness when ignition timing is adjusted on various hills. Try higher...

1ppm iron per 1k 😎

Some pleats are certainly wider than others, similar to my last run as well with endurance on this engine. I'm hoping the 5w30 helps. I've had more reasonable consumption with 0w30 and 0w40 in this engine in the past (around 1 quart per 7,000 mile rate) and tried going back to 0w20 with HPL...

I may have used the wrong word, but the washing of carbon deposits away from the piston edge due to oil consumption from the rings 🤷‍♂️

Fram Endurance FE7317

3 quarts to maintain full mark. This time it was consistent rate, mostly rings. Can see ring wash on pistons 1 and 3. Back to 30 grade. I did replace the larger pcv valve halfway through the interval and the consumption halted for a bit.. larger valve seems to be every 10k miles and smaller...

Congratulations. Good efficiency for conditions as well. I believe we are in a similar part of NY. One thing I've noticed with endoscope camera in the direct injection FB engines is just how clean the combustion chamber remains compared to the port injection FB engines, even ones that dont...

Unfortunately no. If I knew HPL was going to clean this area I would've done a before and after for sure. It started as a light varnish, something that wouldn't reflect light, but I can say that varnish is gone now and the back of the vvt solenoid and face of cam sprocket look like new. Maybe...

Extra of engine cleanliness as seen through oil fill

15,600 mile fram endurance from my 2018 Subaru Forester 2.5i 6 speed manual which has now had 48,000 miles of HPL oils. Out/Off: HPL premium passenger car 0w20 Fram Endurance FE7317 In/On: HPL passenger car engine oil 5w30 Filter looks great to me. I changed oil and filter a little earlier...

Agreed. It did not rub off. I wasnt looking for it when I put the filter on new, but it's in a pretty sheltered location unless heat took it off in use.

I agree 100 percent and was surprised but glad this has metal backing.

Opened up a little section ahead of schedule and found wire backing. Good eye BrendanC

You are correct!

You have that right. Will confirm after wicked when cut apart

He tows regularly few hours at a time. Drives everywhere no complaints on power. I believe truck said he is averaging 16 mpg however he uses it altogether

Filter purchased October 2023 if that helps. 🤦‍♂️

Good point. Interesting thing is there is no date code visible. It either isnt there at all or has faded away. New FE10575 by comparison.

100% sure its labeled an endurance. Looking forward to dissecting in a few days

First run with HPL. Anticipating engine cleaning and not trying to over load the filter. After wicking this filter will determine if he will go full oci length on filter in the future.