Blog
Costco Gas Price DB Blog
Guides and notes on Costco gas: station hours, membership and payment rules, fuel grades, and how to read the 30-day price history we publish for every station.
- Newcomers
“Costco Petrol” in Canada: A Newcomer’s Guide to Gas Bars, ¢/L and Pumping
New to Canada? Costco petrol is "gas" at a self-serve "gas bar", priced in ¢/L. How to read prices, octane, timings, payment and today's prices.
· 13 min read
- Cross-border
Bellingham vs Langley and Abbotsford: Is Cross-Border Costco Gas Still Worth It?
Bellingham Costco gas converted to ¢/L and compared with Langley and Abbotsford, plus border waits, card fees, duty rules and a break-even table for BC drivers.
· 12 min read
- Fuel types
Can You Fill Gas Cans or Jerry Cans at Costco? (Plus Propane)
Yes, you can fill approved gas cans at Costco if they sit on the ground. US and Canadian rules, filling steps, which cans Costco sells, and propane refills.
· 12 min read
- Payment
Can You Use a Costco Shop Card or Gift Card for Gas?
Yes, a physical Costco Shop Card works at Costco pumps in the US and Canada, even for non-members. Digital cards don't. How it works and gift card mix-ups.
· 12 min read
- Membership
Can You Use the Costco App or Digital Card at the Gas Pump?
In the US, yes, scan the digital card in the Costco app at the pump. In Canada, no. How to do it, fixes when it won't scan, what the app shows, the old gas fob.
· 12 min read
- Payment
Costco Citi Visa Gas Rewards: The 5% Back and Which Stations Count as "Eligible"
The Costco Citi Visa pays 5% on Costco gas and 4% on other eligible gas and EV charging, up to $7,000 a year. Which stations count, payouts and real earnings.
· 11 min read
- Prices
Costco Gas in Canada vs the US: Why Prices Differ So Much
Costco Canada gas averaged 173.0¢/L on Sept 29, 2026, about level with US Costco converted. Border-by-border prices, taxes, the loonie and provincial gaps.
· 12 min read
- Fuel quality
Does Costco Gas Have Ethanol? E10, Ethanol-Free and E85 Explained
Yes. Costco gas is usually E10, up to 10% ethanol, in regular and premium. What that means for mileage, small engines, E15, E85 and Canadian gas bars.
· 13 min read
- Payment
Does Costco Gas Take Apple Pay? (Tap to Pay, Google Pay)
Yes, US Costco gas takes Apple Pay with a Visa or debit card inside, after your membership card. Tap to Pay, Google Pay, Apple Watch and Canada explained.
· 13 min read
- Payment
Does Costco Gas Take Cash? (And How to Pay With Cash Anyway)
No, Costco pumps don't take cash in the US or Canada. Here's the cash workaround with a Shop Card, plus prepaid Visa, debit, and state cash-acceptance laws.
· 11 min read
- Car care
Does Costco Have Free Air or Nitrogen for Your Tires?
Costco gas stations have no air pumps at the fuel islands. Free nitrogen comes from the Tire Center. Who qualifies, hours, and whether nitrogen beats air.
· 13 min read
- Membership
Does Gas Count Toward the Costco Executive 2% Reward?
No. Costco excludes gas from the Executive 2% reward in the US and Canada. What still earns at the pump, how to spend a reward certificate on gas, and the math.
· 12 min read
- How-to
How to Get Gas at Costco: A First-Timer's Step-by-Step Guide
How to get gas at Costco: scan your membership card, pay with the right card, pick a grade and pump. Step by step for the US and Canada, plus tips and fixes.
· 12 min read
- Payment
How to Pay at Costco Gas in Canada: Mastercard, Debit, Shop Card, and Why Visa Won't Work
Costco gas bars in Canada take Mastercard, Canadian debit and physical Shop Cards, not Visa credit, Amex or cash. Holds, the $100 question, tap and best cards.
· 13 min read
- Fuel quality
Is Costco Gas Bad for Your Car? Watered Down, Burns Faster, Worse MPG: Myths Debunked
No. Costco gas is Top Tier fuel from the same refineries as other stations. Each myth checked, real contamination cases, and what to do if you got bad gas.
· 12 min read
- Fuel quality
Where Does Costco Get Its Gas? Who Supplies Kirkland Signature Fuel
Costco buys mostly unbranded gas from the refiners and terminals that supply each region, then adds its own additive. How it works in the US and Canada.
· 13 min read
- Fuel grades
Costco Gas Grades Explained: 87 vs 91 vs 93, Premium, and Why There's No Mid-Grade
Costco sells two gas grades, usually 87 regular and 91 premium (93 in some states, 85 at altitude). Octane, mid-grade, who needs premium and what it costs.
· 11 min read
- Membership
Do You Need a Costco Membership to Buy Gas? (Gold Star, Expired Cards, Shop Card Trick)
Yes, Costco gas is members-only in the US and Canada, with one exception: a physical Shop Card. Here's how tiers, expired cards, and household cards work.
· 13 min read
- Fuel types
Does Costco Sell Diesel? Which Locations Have It (and DEF)
Yes, but only at about 1 in 9 US Costco gas stations and a few Canadian gas bars. Every location with diesel, how to check, prices, and where to buy DEF.
· 11 min read
- Hours
Is Costco Gas Open 24/7? What Time It Opens, Closes, and Can You Pump After Hours
Costco gas is not open 24/7. Most US stations run 6 AM to 10 PM on weekdays. See opening and closing times by day, holiday closures and after-hours rules.
· 11 min read
- Fuel quality
Is Costco Gas Top Tier? What's Actually in Kirkland Signature Gasoline (2026)
Yes. Kirkland Signature gas is Top Tier licensed in the US and Canada, in every grade. What the standard means, the detergent, and where the fuel comes from.
· 11 min read
- Payment
What Credit Cards Does Costco Gas Accept? (Visa, Mastercard, Amex, Discover, Debit)
US Costco gas takes Visa credit only, plus PIN debit, Apple Pay and Shop Cards. Canada takes Mastercard, not Visa. Tables, rewards, holds and workarounds.
· 12 min read
- Savings
Why Is Costco Gas So Cheap, and How Much Do You Really Save?
Costco gas is cheap because fuel brings members into the warehouse and membership fees carry the profit. Here's the typical discount and real savings math.
· 11 min read