For folks who remember gas prices crossing the $1/gallon threshold, this might sound familiar:

Stuck in the past: Some gas pumps won’t charge more than $3.99/gallon

$4 a gallon gas is definitely a headache for drivers, but it is posing an even bigger problem for some gas stations. In many rural areas of the country, gas stations with older pumps are discovering their pumps were not made to charge more that $3.99 9/10 per gallon.

Rumors of shortages can’t be far behind. What’s old is new again and again and…