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We Love Costco! How Are Costco Gas Prices For RVers??

We Love Costco! How Are Costco Gas Prices For RVers??

Fuel is one of the most significant expenses for RVers, and every nickel counts when you’re filling large fuel tanks and traveling frequently. But as we noted in our recent post about gas prices affecting RVers’ travel plans, there are several ways to offset the high cost of fuel without giving up your plans to hit the road. Today we’re looking at whether Costco gas prices might offer another way to save some dough when fueling up, and if so, just how much cash you can save at Costco pumps. And are there any drawbacks to fueling up your rig at a Costco?

Let’s investigate!

Do All Costco Locations Have Gas Stations?

No. Not all Costco locations offer a fueling station, but there are many that do.

As we write this post, there are 574 Costco locations in the United States and Puerto Rico, 22% of which are in the State of California (132 locations). They also have over 100 locations in Canada, as well as additional locations in 10 other countries. Costco continues to expand, so these stats can change quickly. With well over 800 warehouses (total) worldwide, Costco is the sixth-largest retailer in the world.

You can search for the Costco nearest to you here. When you find a Costco near you or near where you’ll be traveling, an icon of a gas pump will identify whether or not that particular Costco location offers a fueling station.

Photo of a Costco Wholesale Warehouse with warehouse services superimposed on it

When you look up the Costco near you, if that warehouse has a gas station, you’ll see this gas station icon noting its presence at that location.

And if you don’t have a Costco with a fueling station near you, check out our post on the 5 best apps to find cheap gas wherever you are.

Can Anyone Buy Fuel at a Costco Gas Station?

No. As with all things Costco, you have to be a Costco member to buy fuel at a Costco fueling station, although an individual state may prohibit that practice.

We know first-hand that anyone can buy gas at Costco locations in New Jersey. In 2004, it was ruled that Costco’s requirement that people who want to buy gas must pay a membership fee violated New Jersey laws regarding fuel sales.

Besides New Jersey (and possibly other states?), there is one other exception, as stated on the Costco Website: “Costco Shop Card customers do not need to be Costco members.” As the Shop Card is Costco’s gift card, having one allows a non-member to fuel up. You’ll just need to have a member buy one for you.

As a member, once you reach the pump you’ll insert your membership card into the pump first. The system reads the card number and confirms that your membership is active. Only then can you begin fueling.

If you’re a Costco member and you arrive at the pump only to realize that you don’t have your membership card with you, don’t despair! Take a look at your pump number and head over to the attendant booth. They’ll be able to locate your account and if your membership is active they’ll authorize the pump for you and you can fill ‘er up!

Using a Costco Shop card of course does not require inserting a membership card (since you may or may not have one). Costco attendants are great, and can help if needed!

How Much Does a Costco Membership Cost?

Costco offers a few different memberships. The traditional “Gold Star” membership costs $60 a year as does the business membership.

An “Executive” membership costs $120. This membership includes an annual 2% reward on qualified Costco purchases (see the terms & conditions here), as well as additional benefits and savings on select Costco travel products and Costco services.

Photo of a Costco Executive membership card

Costco’s Executive membership costs $120 annually but offers a 2% reward on qualified Costco purchases.

We’ve been Costco members for as long as we can remember, and buy a LOT there. We shop there so much that our Executive membership is totally paid for each year by the annual 2% reward, with some left over. We’re members for free! (Spending $6,000 per year is all it takes to equal a free Executive membership.)

Where Does Costco Get Its Fuel?

Costco notes that the company buys the fuel it sells from major refineries and distributors in each area. But here’s what you need to know for your own peace of mind:

All Kirkland Signature Fuel is guaranteed like all of the merchandise you’ll find in Costco warehouses.

Moreover, since March of 2014, Kirkland Signature™ Gasoline has been certified to meet TOP TIER™ performance standards. See the pertinent information here.

Also, since August of 2017, Kirkland Signature™ Diesel has been certified to meet the Top Tier performance standards. You’ll find more on that certification here.

Is it Cheaper to Buy Gas from Costco?

In many states, Costco gas prices are the least expensive gas of any fueling station throughout the state. Costco is generally one of the cheapest places to fuel up.

With that said, how much cheaper Costco fuel is than its competitors varies by location and even by the day. But in some areas, you’ll save as much as 30 cents per gallon by fueling up at Costco rather than at a neighboring station.

That’s as much as a $30 savings when adding 100 gallons to our tank.

Can You Buy Diesel Fuel at Costco?

Photo of a hand taking hold of the diesel pump at a fueling station

Some Costco fueling stations carry diesel fuel but the majority do not. It’s wise to call ahead to find out prior to pulling your rig into the waiting line.

Since Costco gas prices are often the cheapest, it’s good to know that some locations carry diesel, too. As we noted above, Kirkland Signature™ Diesel has been certified to meet the Top Tier performance standards since August of 2017. Unfortunately, the majority of Costco gas stations don’t carry diesel. But we always make note of those that do!

Is There a Downside to Buying Fuel at Costco?

If there’s a downside to buying fuel at Costco (other than needing to be a Costco member which we certainly don’t see as a downside at all), it’s the fact that Costco’s low prices aren’t a secret! As a result, there are often long lines, particularly at certain times of the day.

Along the same lines (crowded stations), it may be difficult, especially at smaller locations, to maneuver an RV up to the pumps. When we’ve identified a Costco with diesel fuel, we check out both the Google Satellite View and Street View to scope the situation. That gives us a good idea of what the access is like, and whether or not we’ll be able to fit in with our RV and take advantage of the cheap Costco gas prices!

With Peter’s background as a tour bus operator and instructor, and Safety & Training Manager of a major bus company (operating in New York City no less!), we generally have an advantage when it comes to navigating tight locations. Be sure to stay within your own comfort zone.

Pro Tip:

It’s best to schedule your trip to a Costco fueling station during off-peak hours, especially early afternoons, mid-week. Although with the price of fuel these days, and Costco’s competitive prices, it can be crowded just about any time.

Your best bet to beat the crowds is likely by going in the early morning hours when the gas station is open but the warehouse is not. This can be particularly advantageous to RVers. Fuel up, park your rig at the warehouse, and have some breakfast on board while waiting for the store to open. Then stock up on groceries!

Do You Fuel Up at Costco?

So, tell us – do you fill ‘er up at Costco? If so, what advantages and/or disadvantages have you experienced? Have you found Costco’s fuel prices to be significantly lower where you fuel up? Leave a comment below and let us know!

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Sunday 19th of May 2024

Not only do I buy my diesel at Costco (when diesel is available), but we also carry a Sam's Club card for those stations too! Using Gas Buddy to search for cheap fuel on our trips we have noticed that both Costco and Sam's Club are usually the cheapest in the area in which we are driving.


Friday 17th of May 2024

We too have been members of Costco for many years, we have a Diesel Motorhome and are unhappy that diesel is not available at as many places as gas is. We fill our toad only at Costco if at all possible, the cheaper price (anything from 10c to 40c per gallon) AND the 4% cash back at the end of the year, makes Costco gas the cheapest anywhere by far! Even when there are long lines, (most of the time), it never really takes long to fill up and be on your way.

Joe Curbelo

Thursday 16th of May 2024

Great post guys. I would venture to say however that you have a better chance of finding maneuverability at a diesel pump than a gas pump. That's my biggest challenge with a gasser.


Thursday 16th of May 2024

If those diesel pumps are at a truck island, you're right @Joe Curbelo... but at Costco, they're usually in among the regular gas pumps, so they weren't any easier for us (though Peter's driving skills made them more of an option than for most people 😉). Maneuverability/access is usually the biggest reason that most people prefer going to larger fuel stations near the highway, rather than at a small, in-town station.

Jeannie Flores

Wednesday 17th of May 2023

I always buy gas at Costco if one is available. I find the prices to be the best most of the time. I feel safer about using their pump pay pads when it comes to fraudulent tampering on the pay pads because of the attendants monitoring activity at the pumps.


Wednesday 17th of May 2023

We check Costco whenever we are near one and need diesel fuel. As you mentioned, it is often quite a bit cheaper than other stations in the area. I read recently they are removing diesel from locations that don't pump "enough" and converting those tanks to gasoline. I have also noted that two new Costco's in my area did not put in diesel pumps. We are headed for Alaska and will probably fill up at their Anchorage location when heading to the Kenai and on the way back, I remember it being easy in and out for a 40' pusher with tow.

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