U.S. diesel prices hit a record on Friday.

The price passed $6 a gallon on average.

The national average is nearly $6.06.

It was $5.85 last week.

It was about $3.71 a year ago.

This comes from AAA.

The rise follows Washington's war with Iran.

The war has disrupted the world's fuel flow.

Diesel powers many freight and delivery networks.

So higher prices mean costlier transport for everyday goods.

Some businesses have added fees.

They added fees on online orders and mail packages.

Groceries may see the biggest impact.

This is especially true for perishable foods like meat and produce.

These foods must be hauled and restocked often.

Diesel and gasoline prices track crude oil.

Crude oil has risen again.

This week, Brent and U.S. crude both passed $100 a barrel.

This is the first time in months.

Fighting has escalated.

President Donald Trump said oil prices likely won't fall.

He said this will last until after November's midterm elections.

Diesel is now over 60% higher than before.

The U.S. and Israel attacked Iran in late February.

At that time, the average was about $3.76 per gallon.

The IEA reported Friday on Saudi oil production.

It fell to a three-decade low last month.

This was due to Houthi attacks.

The IEA also noted Ukrainian attacks.

These attacks have nearly halted Russia's product exports.