$10 cabin air filter https://www.amazon.com/gp/product/B014TYRQUY/
$11 Subaru oil filter https://www.amazon.com/gp/product/B00I798FIA/
$22 0w-20 oil https://www.amazon.com/gp/product/B00JGQLZJ4/
$10 engine air filter https://www.amazon.com/gp/product/B001C6Q34S/
$53 is less than $170 though you may have to invest a little time. DIY and save some dollars. These are the products I use on my wife's '16 so your mileage may vary.