Man I was disappointed in Costco gas prices. I thought they were cheaper than the rest but they were right there with everyone else when I filled up on Saturday. 2.75 a gallon. by Monday all the cheap places were at 2.89I see that Costco premium is $3.39 (others are averaging $3.80) today, and 4 stations next town over is selling premium for $4.09 a gallon. I'm wondering where Costco will be tomorrow.