Oil filter Wix or OEM Subaru
Switch to a high quality oil filter to allow oil to flow quicker at startup. The rattle, if timing chain related, is likely one of the hydraulic tensioners not filling with oil as quickly as it should so you hear the chain rattle till it tightens. A higher quality filter will help. Wix would be my recommendation.
On my '21 XLE I use WIX 51394 oil filter which holds more oil and is slightly longer than OEM. I use Mobil 1 Extended Performance 0W-20.
Just buy Wix filters - rockauto is cheapest I have seen even compared to Amazon - use the 10% code to get free shipping
Personally, I just go ahead and spend the few extra bucks on wix XP.
Wix filters are high quality and affordable, usually get those on amazon.
I use a good filter I use Wix XP.
Oil changes are simple, 7 quarts of Mobil 1 ESP X2 oil, quality filter - I like Wix.
Also get a good Putolator or Subaru brand oil filter that is rated for the higher Subaru oil pressure so that it is filtering more often and not blowing open the internal filter bypass because Clean oil will make the engine last longer.
I supplied my own oil filter, a Wix 57002 for my 2020 6.
Had a WIX 57312 instead of a Motorcraft EC-781. So yeah, it fit but it was allowing oil to bypass the filter completely.
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