On the Dash: Iran conflict disruptions are cutting oil suppliers’ notice before price hikes to days, not weeks. Dealers now pay $5 to $7 more per oil change than they did in March. Some automakers are already rationing synthetic motor oil for service departments. The Iran conflict is driving up the cost of a routine oil change. With attacks on Persian Gulf refineries cutting into the supply of synthetic motor oil, lubricant suppliers are raising prices faster than dealers can prepare for. Service departments used to get about 30 days’ notice before a price increase took effect. That window shrank to an average of 14.6 days in 2026, according to…
