Diesel Fuel Tips & Price Guides

Diesel costs more at the pump than regular gasoline most of the time — but not always. Here's what actually drives diesel prices, when they flip, and how to find the best diesel prices near you.

Diesel prices follow predictable weekly and seasonal patterns. Knowing when prices are lowest can save fleet operators and diesel drivers hundreds of dollars a year.

Both Costco and Sam's Club offer diesel at select locations — and both beat retail station prices by a wide margin. But which one is cheaper for diesel specifically, and which locations actually carry it?