Question 1

What time is Costco gas least busy in Seattle, Washington?

Accepted Answer

The Costco gas station in Seattle is least busy on Tuesday and Wednesday mornings between 7 and 9 AM. Avoid Friday evenings and Saturday mornings — those are the busiest times. On weekdays, lunchtime (11 AM–1 PM) and after 7 PM also tend to be quieter.

Question 2

What types of gas are available at Costco in Seattle?

Accepted Answer

This Costco location in Seattle, WA offers regular unleaded ($3.55/gal), premium ($4.05/gal), and diesel ($3.79/gal).

Question 3

What are the gas station hours at Costco in Seattle, WA?

Accepted Answer

Costco gas station hours in Seattle: Monday–Friday 6:00 AM - 9:30 PM, Saturday 6:00 AM - 8:00 PM, Sunday 7:00 AM - 7:00 PM. Hours may vary on holidays — call ahead at (206) 622-3136 to confirm.

Question 4

How much can I save on gas at Costco Seattle compared to other local stations?

Accepted Answer

Members typically save 10–20 cents per gallon compared to nearby gas stations. At 15 gallons per fill-up, that's $1.50–$3.00 in savings each time you fill up. Over a year of weekly fill-ups, that can add up to $78–$156 in fuel savings — often covering the cost of membership.

Question 5

Do I need a membership to buy gas at Costco in Seattle?

Accepted Answer

Yes, you need an active Costco membership to purchase fuel at this location. A basic membership costs $65/year. The gas savings alone often pay for the membership within a few months for regular drivers.

Question 6

Can the gas hoses at Costco Seattle reach both sides of my car?

Accepted Answer

Yes. Costco pumps are equipped with extended hoses that reach both sides of your vehicle. You can pull into any lane regardless of which side your fuel door is on. This design keeps lines moving faster — you don't have to wait for a specific pump.

Question 7

How long is the typical wait time at Costco gas in Seattle?

Accepted Answer

Wait times vary significantly by time of day. On a Tuesday morning, you can often fill up with no wait at all. On a Saturday between 10 AM and 2 PM, waits of 10–20 minutes are common. The Seattle location typically moves quickly once you get to a pump — expect 3–5 minutes to fill a standard tank.

Question 8

What payment methods does Costco gas in Seattle accept?

Accepted Answer

Costco gas stations accept Visa credit cards, Costco Shop Cards (gift cards), and most debit cards with a PIN. They do NOT accept cash, Mastercard, Discover, or American Express.

Question 9

Does this Costco in Seattle have diesel fuel?

Accepted Answer

Yes, this Costco location in Seattle offers diesel fuel at $3.79 per gallon as of the latest update. Diesel pricing can change throughout the day.

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Frequently Asked Questions — Costco Seattle

What time is Costco gas least busy in Seattle, Washington?

What types of gas are available at Costco in Seattle?

What are the gas station hours at Costco in Seattle, WA?

How much can I save on gas at Costco Seattle compared to other local stations?

Do I need a membership to buy gas at Costco in Seattle?

Can the gas hoses at Costco Seattle reach both sides of my car?

How long is the typical wait time at Costco gas in Seattle?

What payment methods does Costco gas in Seattle accept?

Does this Costco in Seattle have diesel fuel?

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