Costco Gas Station is a membership-based fuel center that offers Top Tier rated gasoline, including the Kirkland Signature™ Gasoline formulated to clean engines and help vehicles run like new. The gasoline prices at Costco are consistently the cheapest in the area, and the stations often have multiple pumps, allowing customers to get gas quickly without long wait times. Customers report that the best times to visit the Costco Gas Station are in the morning or right before closing, as these tend to be less busy periods. The staff is described as friendly, and the pumps are always clean. While the lines can be long during peak hours, they tend to move quickly. The Costco credit card, which offers 5% cash back on gas purchases, further enhances the value proposition. Overall, Costco Gas Station provides high-quality fuel at unbeatable prices, making it a popular choice for Costco members looking to save money on their transportation costs.