Finding cheap gas is a top priority for most families today, and warehouse clubs are a great place to start. Costco and Sam’s Club consistently offer fuel prices that are lower than those at traditional neighborhood gas stations. They operate on a different business model that does not rely on making a huge profit on every gallon sold. Instead, they use fuel as a membership perk to get you into the store, where you are more likely to buy other goods. Here are seven reasons why these clubs can keep their pump prices well below the local average.