Full Breakdown
Costco Rationing Motor Oil as Prices Near Double Amid Global Supply Crunch
By Drooid · · How we work
Costco’s New Purchase Limits and Price Surge
Costco’s Kirkland Signature full-synthetic motor oil has risen from roughly $30 for a 10-quart jug to $58, and the retailer now limits purchases to two jugs per customer per week. Mobil 1 is capped at five units per member, with a six-quart jug priced at $44. The price increase is about 90 % and marks a shift from Costco’s previous unlimited-quantity model.
Background and Context
The surge coincides with a contraction in global oil supplies linked to unrest in the Middle East and the lingering effects of the Ukraine conflict, which have reduced crude availability for refining. Because motor oil is derived from the same barrels that produce gasoline and diesel, refiners are prioritizing fuel production, tightening motor-oil supply for retail.
Evolving product standards have also raised costs. The American Petroleum Institute’s stricter oil-quality rules and General Motors’ “Dexos” certification now require licensing fees that are passed to consumers.
Data and Statistics
- Kirkland Signature 10-quart price: $58 (up from $30) – The Drive, CarBuzz.
- Purchase limit: two 5-quart jugs per customer per week – The Drive.
- Mobil 1 6-quart price: $44 – Autoguide.
- Mobil 1 purchase limit: five units per member – Autoguide.
- Crude oil price: around $100 per barrel – Jalopnik.
- Diesel price: nationwide average above $6 per gallon – CarBuzz.
Key Figures and Groups
- Costco Wholesale Corp. – Retailer implementing the limits.
- Kirkland Signature – Costco’s house-brand motor oil.
- General Motors (GM) – Owner of the Dexos certification program.
- American Petroleum Institute (API) – Industry body whose standards increased testing costs.
- The Auto Wire – Analyst source linking refinery margins to oil-supply constraints.
Why It Matters
Consumers now face a significant expense for routine maintenance, and the weekly cap prevents stockpiling, likely driving shoppers to multiple stores. Analysts warn that if the squeeze continues, other wholesale chains may adopt similar rationing, heightening market pressure.
Official Statements and Responses
Costco has not commented on the duration of the rationing or the price drivers. No statements from GM, the API, or refinery operators were identified.
Conflicting Reports and Gaps
While outlets agree on price levels and limits, none provide a timeline for ending the rationing, leaving its duration uncertain.
What’s Next
The ongoing closure of the Strait of Hormuz, which blocks shipments of roughly 20 million barrels of oil daily, is cited as a factor that could sustain the shortage. If the geopolitical situation remains unchanged, elevated prices and purchase caps are likely to persist, and other retailers could follow Costco’s lead.