Diesel prices dipped nationally to $3.477 per gallon, with the Midwest seeing the largest 4-cent drop this week.

Diesel prices have dropped to $3.497, while gasoline prices increased to $3.147. Diesel prices fell most in the Midwest at $3.432, while gasoline rose significantly in the Gulf Coast to $2.722.

Proving last week’s surge wasn’t a fluke, the average national on-highway diesel price skyrocketed 22.2 cents to reach $4.127 a gallon, according to Energy Information Administration data released ...