At Costco we get 5% back on gas. When other stations charge $3.29, Costco has it for $2.90. Then the 5% cash back makes it more like $2.76.
There are two Costcos near us - 15 minutes one way and 30 the other. We get close to on or the other so frequently that we seldom get gas elsewhere. And yes, stopping in for a tub of sour cream often means hitting $150 at the checkout.
Years ago we took one of the Grandgirls along on a Costco shopping trip. Told our Son that a lady asked which aisle we found her in. Son said "That lady should know better. Costco doesn't sell anything that little". Oh, we just ordered a new beach towel there:
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