Strictly anecdotal and, regional, from FL up through eastern GA, into SC and home to western NC, the Interstate highways exits had regular all well under $4. Bought some Shell Premo for the Vette in SC for $4.05, which was as low as I saw; that joint had reg for $3.80 and Diesel for $3.84, cash! A quick stop type joint...needless to say, the pumps were packed and even big trucks were trying to get in line for that cheaper diesel.

Meanwhile, on our ~800 mile run north back to the Mtn house, the freakin Interstates are packed, so the impact has not taken effect on our route. And, it hasn't hit that mystical high 4s to 5 bucks around this area, either.
GL, mD