COLORADO — Colorado drivers could notice some relief at the pump this week, thanks to a seasonal shift in gasoline.

The U.S. Environmental Protection Agency requires gas stations to switch from summer-blend to winter-blend fuel each fall. Retailers can begin selling the new blend as early as Sept. 16, though the transition takes time as stations work through their remaining summer supply.

Winter-blend fuel is less expensive to produce — typically 10 to 15 cents per gallon cheaper — and AAA says those savings are usually passed along to drivers.

“Winter blend is between 10 and 15 cents less expensive to produce per gallon,” said Skyler McKinley with AAA. “Generally those savings are passed directly on to consumers. So people, you know, they have something to look forward to.”

The two bl

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