What kind of oil filter are you running? My LQ4 was always 40 at idle when warm, about 50 to 60 cruising. I started using AC Delco filters and ended up just under 40 at cruise and 20 hot at idle like you have. Went to a Wix at my next oil change and got the original pressure back. The Delco filter was restricting pressure. No problems since with Wix
What kind of oil filters are you using? Ac delco filters caused similar oil pressure on mine, switched to wix and now it always has like 45psi at hot idle, and around 60 at cold start.
I wouldn’t worry about who does the service. Just don’t use shitty Filters. Use OEM or Wix.
I used the WIX as it looked like it matched the dealer installed filter better. It also has internal O rings that seem to seal it better on the shaft.
For filters I have never been done wrong by wix. Price is right and the quality is there. I converted my hilux to use wix 51515 filters because I was sick of ordering them from australia for $40 each, and definitely not buying the $80 one I could get locally. Now my filters cost me like $7. Will pay for the cost of the conversion in a couple years of oil changes.
I order the OEM Subaru filters and use Pennzoil Ultra Platinum 5w30. In your case you’d probably want to start using Pennzoil Platinum High Mileage.
A good filter is $15 (I use Wix XP) and I get my full synthetic oil at Costco whenever it goes on sale for $3/qt.
I don't know about a lot of different oil filter manufacturers but a wix and Napa are the same and a good quality filter. Wix makes a lot of different brands and I think they are the best.
Had a conversation with a WIX rep and was told their best filter is done filtering around the 5000 mile range.
The blue Subaru filters are garbage. Made my FRAM in US. Use the black ones from Japan instead.
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