But you can get one of the chain's best deals without ever setting foot in the store.
That's because Costco loyalists know there's no better place to buy gasoline than at the wholesale giant's pumps, which regularly undercut the competition.
Costco said in its report that it believes its gasoline business "enhances traffic in our warehouses."
Even if you're not a Costco shopper, the savings on gasoline alone can make the price of a $60 membership worthwhile.
Using a little back of the envelope math, David and Susan conservatively estimate that a member would only need to drive 7,500 miles per year while exclusively buying Costco gas before their membership pays for itself.
Persons:
David Schwartz, Susan, David
Organizations:
Costco, Exxon, CNBC