Today you reported a 3.749 price for diesel at Casey's 3260 University Ave Waterloo. Even back as a Holiday station - has never sold Diesel.

I sincerely doubt HyVee in Cedar Falls dropped the price of premium $.10 in the 15 minutes between when I checked the pump and when you reported that the other 3 fuels had NOT changed price. Please verify prices at the pump. (this station doesn't post premium on the large boards, and is the only CF station with ethanol-free premium which is more costly -- you have to drive up to the pump to check the price)

Conoco at123 East 18th St near State St doesn't sell Premium fuel. Why did you submit a premium price?

Caseys at 5226 University Ave & Rownd St Cedar Falls has never sold Premium fuel.

Since you're an Iowa site member of some time, you should know that most stations in Iowa the lowest priced gas is the mid-grade. There are a few exceptions and Philips 66 on Park Ave in Muscatine is one of them. Their lowest priced gasoline is also the lowest grade or "regular" grade of gasoline.

Casey's in Tipton doesn't sell Premium Fuel.