6 Qts of Mobil 1 0w-20 at Costco for $27 and OEM filter for $6.83. If you wanted, Costco Kirkland brand 0w-20 full synthetic is $24 for 10 Qts.
Dealers are tricky, I found an online parts site that is operated by one of my local dealers and the pricing is always lower than going in person to buy at the parts counter. I buy my filter here and go in person to pick it up, for anyone that lives in the Bay Area:
https://parts.diablosubaru.com/oem-p...ter-15208aa130