Costco Wholesale, one of Americas largest retailers of discounted gasoline, has announced a 20-gallon per-vehicle purchase limit at all of its fueling stations effective immediately. The restriction, confirmed by multiple store locations across the country, comes as concerns over potential oil supply disruptions ahead of Tuesdays Iran sanctions deadline drive a surge in consumer demand at the pump.
What Prompted the Limit
Costcos gas stations have long been among the busiest in the country, offering prices that typically run 20 to 40 cents below nearby competitors. In recent days, lines at many Costco fuel stations have stretched to 30 minutes or longer as consumers rush to fill up before anticipated price increases. Some locations reported running through their daily fuel allocations hours ahead of normal closing times.
A Costco representative stated that the purchase limit is a temporary measure designed to ensure fair access for all members. The company emphasized that its fuel supply remains stable but acknowledged that demand has increased significantly in the past 72 hours. Similar measures were last implemented during the Colonial Pipeline disruption in 2021, when panic buying led to temporary fuel shortages across the Southeast.
How the Limit Works
The 20-gallon restriction applies per vehicle per visit. Members will see their pumps automatically shut off once the limit is reached. For most passenger cars, which have fuel tanks ranging from 12 to 16 gallons, this limit will not affect a typical fill-up. However, owners of trucks, SUVs with larger tanks, and those attempting to fill portable containers will be impacted.
Costco has also temporarily suspended the filling of portable gas containers at its stations. This policy is consistent with safety guidelines and helps prevent hoarding behavior that could exacerbate supply concerns.
Other Retailers Watching Closely
While Costco is the first major retailer to announce formal purchase limits, other large fuel retailers are monitoring the situation. Walmart-owned Sams Club and BJs Wholesale, which operate similar membership-based fuel stations, have not yet announced restrictions but indicated they are prepared to implement measures if demand patterns warrant it.
Independent gas station owners in several states have reported increased sales volume over the past week. Some operators in California, Florida, and Texas have voluntarily implemented informal purchase limits to manage their supply. Industry group the National Association of Convenience Stores noted that while the current situation does not constitute a supply emergency, prudent inventory management is advisable.
Impact on Consumers
For the average Costco member, the practical impact is minimal. A standard sedan or compact SUV will still be able to fill from empty to full in a single visit. The restriction primarily targets those attempting to purchase fuel in bulk or fill multiple containers, behavior that can create localized shortages even when overall supply is adequate.
Members who rely on Costco fuel for commercial vehicles or who need to fill larger tanks may need to plan additional visits or supplement with fuel from other stations. Costcos gas prices remain among the most competitive in the market, with current national averages at their locations running approximately $3.45 per gallon compared to the national average of $3.78.
Historical Context
Fuel purchase limits, while uncommon, have been deployed during several previous energy disruptions. During Hurricane Harvey in 2017, multiple Texas retailers imposed similar restrictions. The 2021 Colonial Pipeline cyberattack prompted widespread limits across the Eastern Seaboard. In each case, the restrictions were temporary and lifted within days to weeks once supply conditions normalized.
Energy analysts suggest that the current situation differs from those crises in an important way. The potential disruption has not yet occurred, and domestic oil production remains strong at approximately 13.2 million barrels per day. The elevated demand is driven primarily by consumer anticipation rather than actual supply shortfalls.
What to Expect This Week
If Tuesdays deadline passes without a diplomatic resolution, additional retailers may follow Costcos lead in implementing purchase restrictions. Conversely, a successful negotiation could quickly ease consumer anxiety and return purchasing patterns to normal. Regardless of the outcome, Costco has indicated that its purchase limits will remain in effect until demand stabilizes, likely for at least one to two weeks.
