Costco Fuel Guide Center
Practical guides to help you save money and get the most out of every fill-up
Does Costco Gas Really Save You Money?
How warehouse fuel pricing works, why Costco gas is usually cheaper than nearby stations, and how to tell when the savings are worth the trip.
What Is Top Tier Gasoline and Why It Matters
Top Tier gasoline contains extra detergent additives that keep engines cleaner. Learn what the standard means and which fuels meet it.
Costco Gas Station Hours: When to Fill Up
Costco fuel stations keep their own hours, separate from the warehouse. Learn the typical pattern and how to check your local station before you drive over.
Do You Need a Membership to Buy Costco Gas?
In most of the US and Canada, Costco fuel is members-only. Here is how the rule works, the common exceptions, and what to expect at the pump.
Regular vs. Premium vs. Diesel: Which Fuel Does Your Car Need?
Octane ratings explained in plain language, when premium is actually required, and why putting diesel in a gasoline car (or the reverse) is a costly mistake.
10 Practical Ways to Improve Your Fuel Economy
Driving habits and basic maintenance that measurably reduce fuel consumption — no gadgets, no additives, just what actually works.