Because of that increased pumping of oil and seasonal variations in the use of pipeline capacity to move crude oil to refineries around the country, the area is experiencing a glut, Laskoski said.
The GasBuddy.com website Tuesday showed Wyoming with the nation's cheapest average price of regular gas, at $3.09 per gallon. Colorado was No. 2 at $3.127. Utah and Montana also are seeing prices below $3.30 per gallon.
Laskoski said it's hard to predict how long the Rocky Mountain West's enviable position will last - "at least for the next several months," he said.