Costco’s gas stations are known for offering some of the most competitive prices in the U.S., with potential savings for members reaching up to $300 per year on fuel alone. This is particularly ...

A Costco membership unlocks savings at the fuel pump as well as bulk groceries, but is the membership price worth the fuel savings? We do the math.

“If your car requires 89 Octane, you can usually save money by mixing 87 Octane and 93 Octane. For example, if you are getting 15 gallons, you could get 10 gallons of 87 and then 5 gallons of 93,” ...