Interesting.
Two weeks ago I took a trip from Indiana to S. Carolina and as I went farther south the gas (not diesel) prices dropped about a dollar a gallon.
Diesel was about $1.70 more than premium in the ATL area the last I looked, which was about a week ago. ~$3.30 for premium and $5 for diesel. I’ll fill up later today and try to get a diesel price too, and try to remember to report back.