$15 不到, 2x 5Q = 10Q,各种规格的 (0-20W, 等等)
长这个样
https://www.costco.com/kirkland-signature-5w-20-full-synthetic-motor-oil-5-quart%2c-2-pack.product.100518854.html
网上说$30,但店里标价$14+。也许我看错了?或者是单价$15/jug?