Not just fuel for their logistics, but also selling gasoline in their Wal-Mart brand gas stations near their stores, Neighborhood markets, and Sam's Club. They

Not just fuel for their logistics, but also selling gasoline in their Wal-Mart brand gas stations near their stores, Neighborhood markets, and Sam's Club. They ditched Murphy USA a few years back for much of this fuel and began sourcing it themselves. It's a way to ensure those prices are the lowest they can reasonably offer and still turn a profit.