[keithatpda]

Hello all
Second time poster and first time subie owner, 2019 sti limited with 21k on it when purchased. I have put roughly 3.5k on the car since purchase and am ready to perform the oil flush. For those who do change their oil on their own what oil brands and filters do you use?? I read a lot claiming that OE Subaru oil doesn’t do the best so I am looking to fill with something more trustworthy. NOTE: Completely stock, base MAP and filled with 93 as much as possible. I did notice the yellow mustard within the fill port for the oil and that alone was enough to make me buckle down to get this done. I know it’s normal but still not a very pretty sight to see. Any response is great and is highly appreciated.

2009 2.5ltr WRX 200,000 miles on Castrol edge 5-30, lots of autocross and hillclimbs, cyl 4 exhaust worn out, caused misfire error, everything else seemed perfect. Rebuilt heads new sti short block minor mods all good. 50yrs using Castrol no complaints.

 

[keithatpda]

Do you have any issues with mobile1? Ive heard from 2 subaru specialty shops to not use mobile 1 brand for subarus specifically. I have always ran mobile1 in my past cars so this was a surprise. Something about it just doesnt work well with the subaru engine.

I have heard similar things re Mobile 1, I doubt they are true. Castrol promote the 5-30 as "for" high performance turbo cars. Castrol have a pretty good race car reputation, if you are stressing the car a bit, autocross or similar, I would change the oil once a month, otherwise 3,000 sounds good to me.