Costco Gasoline is a membership-based fuel center that offers Top Tier rated fuel, including the Kirkland Signature™ Gasoline formulated to clean engines and keep vehicles running like new. Customers appreciate the consistently low prices, which are typically around $0.20 cheaper than regular gas stations. While the fuel centers can get busy, with lines forming, the service is generally quick, and the one-way drive-through helps improve traffic flow. Customers often combine their fuel stop with a trip to the Costco warehouse for monthly shopping. Overall, Costco Gasoline provides high-quality fuel at the best possible prices for its members.