I'm popping in the car starting up right now.

Food delivery driver Lee Dahl gets his day started on Detroit's West Side.

He opens up the Uber Eats app to an offer.

$7 for a total of 12 miles and estimated 34 minutes.

You really can't make that happen.

So he turns it down.

Then it gets another request, this time at a Popeyes that's nine miles away.

I can make $16, do it in 35, 40 minutes.

I'm starting out of the gate good.

Dahl uses a spreadsheet to meticulously track how much he makes delivering and how much he spends on gas.

The math has been looking different recently due to the war the U.S. and Israel started against Iran.

I'm really trying to keep my mileage down because a key metric for me, having an older car, is dollars per mile.

One fifth of the world's oil supply used to move through the Strait of Hormuz.

And now, because of the ongoing conflict, tanker traffic through the straight has come to a near standstill.

And without that oil reaching the market, fuel costs are spiking everywhere, including for a gallon of gas where Dahl fills up.

Everything's getting up around $4 in this particular area.

The cost adds up.

Dahl has had to change his delivery strategy.

He is getting pickier and pickier about the orders he takes.

I will take shorter orders that don't pay as much, just take off the wear

and tear and the gas. It may sound counterintuitive, and in the past for me, it was. I would take

the best paying thing. Dahl is 65. He gets some income through Social Security, but says he needs the food

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