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U.S. Costco raises engine oil price and imposes purchase limits, raising questions over EV maintenance cost edge

U.S. retailer Costco has raised the price of its private-label synthetic engine oil and introduced purchase limits, a move seen as a sign of cost pressure across the engine oil supply chain. The increase is linked to higher base oil prices and supply strains, alongside longer-term demand for higher-performance lubricants. Rising engine oil costs could widen maintenance cost differences between electric vehicles and internal combustion cars, though analysts caution it may not sharply boost U.S. EV demand.