Here's my 2.8k sample on my 2.5NA 21 Subaru Outback. I used a regular Wix filter. Viscosity is on the lower side of the range. I'm happy with the results and will change the current oil around 3-3.5k miles. I spoke over the phone with the lab about the fuel dilution. Subaru recommends 6k mile/ 3k mile severe svc intervals. The tech noted 5-6k mile runs are ok. Due to 5% being very common on newer DI cars. This Subaru sees 4 mile round trip daily work commutes and highway 1-2x a week 80% city/ 20% hwy 6-7k mile annually. I think 3-3.5k spring/ fall oil changes should be fine with Amsoil OE.
Here's my previous run results with Amsoil Signture 0w-20 for reference:
Here's my previous run results with Amsoil Signture 0w-20 for reference:
2021 Subaru Outback 2.5L / Amsoil Signature 0w-20 4.9k miles
Here’s my results for the Subaru Outback Limited 2.5L Direct Injection NA engine. It had roughly 4800-4900 miles at sampling. Amsoil Signature 0w-20/ Wix filter. Oil was changed last September and sampled this March. This vehicle is used for roughly 4 miles daily commute round trip in Minnesota...
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