Crazy difference in diesel prices by stations within 100 yards of each other

Diesel right now in Pa is 3.99 to 4.25 per gallon. I can drive into Ohio (18 miles) and it's 3.39 to 3.59 I take my truck on 1/4 tank or less , 5 - 5 gallon cans and 4 or 5 - 5 gallon cans for gas. I can save about $50 combined per trip. Sometimes I stop for dinner (which I would do anyway) and I still have a $20 in my pocket when I'm done. Pa can stick their too high gas taxes you know where. Ohio gets the same weather and their roads ARE WAY NICER!!!