By Matt Egan, CNN

Traffic moves along Highway 101 in Los Angeles on 26 March, 2026.

Wholesale motor oil prices are rising rapidly, and some industry executives are warning of imminent shortages caused by the war with Iran.

Damage to key facilities in the Middle East and the shutdown of the Strait of Hormuz have combined to create a perfect storm in this tiny but critical corner of the oil market.

The risk is that some of the most popular kinds of motor oil will be in very short supply, forcing drivers to delay getting their oil changed or rely on suboptimal lubricants.