2-Pack 5.25oz STP High Mileage Fuel Injector & Carburetor Treatment $3.18 – Walmart By admin | May 3, 2019 11:59 am EST 0 Comment 2-Pack STP High Mileage Fuel Injector & Carburetor Treatment, 5.25 fl oz $3.18 Free 2-day shipping on orders over $35 or Free Store Pick-Up