Costco Is Rationing Cooking Oil, and Nobody Wants to Say Why

If you tried to buy a two-pack of Kirkland Signature olive oil at Costco this month and found a limit taped to the shelf, you weren't imagining things. The warehouse giant has quietly begun capping how much cooking oil customers can buy at some locations, and the company's explanation so far amounts to a shrug and a promise that everything is fine. That's not an answer. That's a vibe. Here's what we actually know. In recent weeks, shoppers across multiple states have reported purchase limits on various cooking oils — olive, canola, vegetable — typically two to five units per member. Costco hasn't issued a formal nationwide announcement. Instead, store employees have offered the standard corporate line: supply chain issues, temporary measure, normal inventory fluctuations, nothing to see here. Compare that with 2022, when Costco openly rationed toilet paper, rice, and oil, and executives went on earnings calls to explain exactly why. This time? Silence. That gap between what's happening on the floor and what's coming out of headquarters is the real story. So what's actually going on? A few possibilities, ranked by how much they should worry you. First, the boring one: regional supply hiccups. Drought in olive-growing regions, shipping disruptions, a bad harvest somewhere — these happen constantly and usually sort themselves out. Companies ration quietly because announcing a shortage causes a shortage. You remember 2020. Tell people there's a limit, and suddenly everyone needs twelve bottles of canola. Second, the uncomfortable one: grocery prices are still climbing, and warehouse clubs are the last place Americans feel like they're winning. When Costco of all places starts limiting staples, it signals that even the bulk-buying fortress isn't immune. That's a psychological blow more than a logistical one, but it matters. Third — and let's be honest about this — there's a marketing angle nobody wants to admit. "Rationing" is a terrifying word that also happens to be fantastic for traffic. Costco knows a shelf limit becomes a headline. Some of this is genuine scarcity. Some of it is a self-fulfilling panic loop where a memo becomes a news cycle becomes an empty shelf. Who benefits from you believing cooking oil is running out? Costco gets urgency and foot traffic. Competitors get to look stable by comparison. Food influencers get content. And the rest of us get to feel vaguely anxious about salad dressing. What you should actually do is almost nothing. Check your local store, buy what you need, skip the bunker mentality. Cooking oil doesn't spoil quickly, but hoarding it doesn't protect you from anything except having too much oil. The honest takeaway: this is probably a real but minor supply blip dressed up as a crisis by a company that benefits from the drama. If Costco wanted to calm people down, it could explain itself in one paragraph. It hasn't. Ask yourself why not.