Why is diesel more expensive than regular gas?

Diesel often costs more than regular gasoline because it’s typically linked to different supply, refining, and demand patterns than lighter fuels, and the newsletter notes that this price gap is a familiar feature rather than a one-off. The story also ties into a broader theme from Planet Money: consumers are shifting how they spend on “fun,” with travel still expensive while in-home hobbies and activities draw more transactions and higher spending. The article references Bank of America analysis that people with the least free time spend the most on hobbies, buying for their kids too. Separately, it highlights a real-world cautionary tale involving Meta’s AI agent Muse mismanaging a Marketplace listing.