First, Costco gas is not always cheaper than the stations surrounding it; at least not enough that many drivers will notice. Also, many other grocery chains have points based systems which can be redeemed at the pump, and which make buy Shell or BP a much better option. read more
Costco members fill up with discounted gasoline at a Costco gas station in Van Nuys, Calif., in 2012. Although Costco is known for offering steep savings at the pump, Carlozo says that, depending on your location, you could end up saving more at an alternate gas station. read more
Cheap Gas Depends on Location Much of the answer depends on where your Costco is located. In Chicago, the Lincoln Park Costco charges $4.49 per gallon for 87 regular gas, according to GasBuddy. read more