Costco Gas is a membership-based fuel center that offers Top Tier rated Kirkland Signature™ Gasoline, designed to clean engines and keep vehicles running smoothly. Known for providing high-quality products at competitive prices, Costco Gas typically has the lowest fuel prices in the area, with regular gas priced around $5.19 and premium at $5.49 as of mid-July. While lines can often be long, they move efficiently thanks to multiple lanes and two pumps per lane. Customers appreciate the fast service and the helpful staff, who are attentive and ready to assist. Visiting early in the morning, particularly on weekdays, can lead to shorter wait times. Access to the gas station is convenient, located near the 91 Freeway, and it opens at 5:30 AM from Monday to Friday. Overall, Costco Gas is favored for its affordability and customer service, making it a go-to choice for many drivers.