Costco Is Limiting Motor Oil Purchases. Here’s How It’ll Affect Drivers

Motor oil is not exactly the kind of Costco item shoppers race to hoard. Yet Kirkland Signature full-synthetic oil now comes with a purchase limit, and the price may sting even more. A 10-quart case that hovered in the mid-$30 range for years is now listed at $57.99. Members can buy no more than two units every seven days. The strange part is that the problem starts thousands of miles from Costco’s shelves.

The Short Answer for Drivers: Don’t Panic

This does not mean America is about to run out of motor oil. The immediate problem is higher prices and potentially fewer choices, particularly among certain synthetic formulations. Other retailers had not followed Costco with similar purchase restrictions as of mid-September, and alternatives remained available. For most drivers, the bigger change could simply appear on the bill at their next oil change.

Why Costco’s Cheap Oil Suddenly Isn’t So Cheap

The squeeze centers on Group III base oil, a highly refined ingredient widely used in modern synthetic lubricants. Holly Alfano, CEO of the Independent Lubricant Manufacturers Association, put the situation plainly: Group III is “in very short supply.” She told Newsweek that its price had jumped 235% since the Middle East war began. Roughly 40% of U.S. Group III supply had come from the region, making disruptions there unusually painful for American buyers.

One Damaged Facility Became a Very Big Deal

The supply chain was particularly vulnerable after damage to Shell’s Pearl gas-to-liquids facility in Qatar, a major source of Group III base oil. The facility had supplied roughly 30,000 barrels per day, and repairs were expected to take at least a year. Other producers in Qatar, Bahrain and the United Arab Emirates have also faced disruptions. That helps explain why improving shipping conditions alone cannot immediately refill shelves.

Why Costco Put a Limit on Your Cart

A purchase cap can sound scarier than the reality. Two 10-quart cases would typically cover roughly a year of oil changes for an average driver, according to Inc. That makes Costco’s restriction more likely to inconvenience people stocking garages or buying for multiple vehicles than someone simply maintaining one car. One Reddit commenter actually applauded the cap, calling it a “Smart move by Costco to avoid panic buyers.”

DIY Oil Changes Just Lost Some of Their Bargain Appeal

The people most likely to notice the difference are drivers who change their own oil. Kirkland synthetic was attractive partly because shoppers could buy a substantial amount cheaply and keep it in the garage. At $57.99 for 10 quarts, that advantage has narrowed considerably. Professional oil changes are feeling the squeeze too: higher lubricant costs have reportedly added roughly $5 to $7 to a Valvoline oil change.

Don’t Grab the Wrong Oil Just Because It’s Available

Here is where a shortage can tempt drivers into a bad shortcut. Motor oils are not automatically interchangeable. Cars can require particular viscosities and performance specifications, so Newsweek advises motorists to follow the requirements in their owner’s manual rather than simply grabbing whichever bottle happens to be cheaper. If your vehicle needs a specific synthetic formulation, checking stock before your scheduled change could save an annoying last-minute search.

Costco Isn’t the Only Brand Feeling the Squeeze

Kirkland is getting attention because Costco’s limit is unusual, but the underlying shortage reaches beyond one warehouse aisle. Costco has also capped purchases of some Mobil 1 oil, while lubricant prices broadly have climbed. An industry survey covering 97 motor oil products found retail prices rose 24.2% between February and August. So switching brands may solve an availability problem without necessarily escaping the price increase.

This Could Stick Around Longer Than Drivers Expect

Anyone waiting a few weeks for everything to return to normal may be disappointed. Alfano said ILMA does not expect the market to normalize until the end of 2027 at the earliest, citing the time required to rebuild damaged Middle Eastern production. New Group III production is being developed in the U.S., but that capacity is also not expected until late 2027. This is a repair-and-rebuild problem, not simply a delayed shipment.

Your Next Oil Change Is the Number to Watch

For now, drivers have little reason to build a motor-oil fortress in the garage. What matters is whether Costco’s limits spread, whether other retailers begin experiencing shortages, and how quickly replacement Group III production comes online. If supplies remain tight into 2027, the most lasting effect may not be empty shelves at all. It could be something much more ordinary and irritating: paying noticeably more every time your odometer says it is time for fresh oil.