A ceasefire won’t fix supply chains overnight. Small garages are already paying the price.

A potential US-Iran peace deal may stop the fighting, but it won’t quickly refill the shelves of auto repair shops from Tokyo to Detroit. Months of supply chain disruption have left small garages short on motor oil, paint, and other essentials, and relief is still over a year away.

What Happened

The Strait of Hormuz closure, triggered by the Middle East conflict in March, cut off nearly 20% of global oil flows. That choked supplies of petroleum-derived products – motor oil, paint thinner, diesel exhaust fluid – that auto shops depend on daily.

In Tokyo, Hiroyuki Nakamura of Shin Etsu Denso says it’s the first shortage he’s seen in 35 years. Fuchu Car, a suburban Tokyo repair shop, has just received its first bottle of pearl-finish paint in two weeks – a supply that lasts roughly that long. About a third of their 160 monthly jobs use pearl white. If paint runs out, the shop may complete repairs and hold off on painting until supplies return.

In the US, Nissan began oil-rationing across dealerships in May. Lubricant prices are not expected to ease until at least mid-2027, according to the Independent Lubricant Manufacturers Association.

Market Reaction

Oil markets remain sensitive to any Hormuz developments. A confirmed reopening would pressure crude prices lower, but supply chain normalization for refined and specialty products will lag considerably.

Why It Matters for Traders

This isn’t just an auto industry story. Prolonged Hormuz disruption keeps energy markets volatile and commodity-linked stocks under pressure, especially paint manufacturers and lubricant producers.

What to Watch

Monitor Strait of Hormuz shipping data, lubricant futures, and any official updates on the US-Iran deal’s implementation timeline.

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