I currently have 80k miles on my 19 Crosstrek running mainly a Purolator One and Mobil 1 5w-30 EP with no problems. Not sure what engine you have but, don't go more than 5-6k on an OCI without testing. I went 9,200 on an OCI and th UOA had fuel dilution at 2.8% so I won't be doing that again.