Costco Doubles Motor Oil Prices Amid Global Supply Crisis

Costco Wholesale has nearly doubled the price of its Kirkland Signature full-synthetic motor oil, raising the cost of a 10-quart case from approximately $30 to $57.99. To manage a global lubricant shortage, the retailer implemented purchase limits restricting members to two units of the house-brand oil per week and five units of Mobil 1.

The price surge is driven by a refining crisis where producers are prioritizing higher-profit gasoline, diesel, and jet fuel over base oils. This shift coincides with Brent crude prices exceeding $109 per barrel and U.S. diesel prices reaching record highs between $6.06 and $6.23 per gallon. Additional costs stem from rigorous licensing fees and testing standards for modern turbocharged engines, specifically the dexos1 Gen 3 certification required by General Motors.

Supply chains are severely strained by geopolitical instability. Conflict between the United States and Iran has led to a blockade of the Strait of Hormuz and March 2026 airstrikes on Qatar's Pearl GTL facility. Further disruptions include Houthi activity in the Bab el-Mandeb Strait and drone attacks on Saudi Arabia's East-West Pipeline. These events have choked off the flow of Group III base oils from the Persian Gulf, creating scarcity that has also affected other industry players like Jiffy Lube.