Costco has raised the price of its Kirkland Signature full-synthetic motor oil to about $58 for a two-pack of 5-quart containers, nearly double last year's price, and limited purchases to two boxes per week. The increase follows rising crude oil prices due to the ongoing war between the United States and Iran, which has disrupted Middle East oil supplies. Brent crude exceeded $109 per barrel, and U.S. gasoline and diesel prices have climbed. Oil companies are focusing on diesel and gasoline production, reducing motor oil supply. Local auto shops are also facing higher costs, passing them to customers.
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