Costco Limits Motor Oil Purchases Amid Higher Prices
Costco Limits Motor Oil Purchases Amid Higher Prices
Anonymous
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Patrick De Haan of GasBuddy said the limits would affect ordinary drivers very little: a typical car uses four to five quarts roughly every 5,000 miles, making Costco’s cap “an extremely reasonable amount”; he joked that concern would mainly apply to someone operating “a fleet of thousands of cars.”
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The reported energy-market shock included specific infrastructure and shipping disruptions: the Houthis’ seizure of the Bab el-Mandeb Strait and attacks on Saudi Arabia’s East-West oil pipeline were cited as triggering a 4% rise in oil prices, with Brent crude reaching $105.66 a barrel and West Texas Intermediate reaching $101.28.
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The United States reportedly imports more than 40% of its Group III base oils from the Middle East, making regional supply disruptions particularly consequential for synthetic motor-oil production.
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Andrew Lipow of Lipow Oil Associates said the squeeze is concentrated in premium base stocks and identified Qatar, the United Arab Emirates and South Korea as suppliers of Group III base oils, which he said have “superior performance qualities.”
Costco has nearly doubled the price of Kirkland Signature motor oil and imposed strict purchase limits as global energy disruptions squeeze supplies of specialized base oils. A 10-quart case of full-synthetic oil jumped from about $30 to $57.99, with members now capped at two cases every seven days. GasBuddy says the limits pose little threat to typical drivers, but Lipow Oil Associates warns the shortage could strain commercial fleets and repair shops.
Why Motor Oil Prices Have Doubled
The shortage stems from disrupted supplies of Group III base oils, which compete with gasoline and diesel for refinery capacity. The U.S. imports more than 40% of these oils from the Middle East — primarily Qatar, the UAE, and Bahrain. Iranian airstrikes in March 2026 damaged Qatar's Pearl GTL plant, halting major refining for an estimated 12 months. Lipow Oil Associates noted these base stocks have superior performance qualities needed for modern engines.
Global Energy Market Adds Fuel to the Fire
Houthi operations in the Bab el-Mandeb Strait and attacks on Saudi Arabia's oil pipeline sent crude prices soaring. Brent crude reached $105.66 per barrel, while West Texas Intermediate hit $101.28. Oil prices jumped 4% amid the disruptions. U.S. gasoline now averages $4.30 per gallon, with diesel exceeding $6 in some regions. Refineries shifted focus toward higher-margin diesel and jet fuel, reducing base-oil production.
For Most Drivers, Limits Are Reasonable
GasBuddy's head of petroleum analysis downplayed consumer impact. He noted that a typical car uses four to five quarts every 5,000 miles, making Costco's two-case limit per week "an extremely reasonable amount." He joked concerns would mainly affect someone running "a fleet of thousands of cars." Most individual drivers purchase oil sparingly and would hit the cap only if hoarding.
Commercial Operators and Shops Face Real Pain
While retail shoppers face minimal disruption, commercial fleets, independent mechanics, and quick-lube services confront severe cost inflation. Mobil 1 six-quart packs sell for $44 with a five-unit cap per member. Supply tightness has also forced strict engine-performance testing and licensing requirements, raising synthetic lubricant costs further. Two major automakers have warned of dwindling service-center motor oil stocks, signaling broader sector strain.
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