This is true...check EIA data as well...

AI Overview

Yes, seasonal adjustments are a major factor driving down gasoline prices. [1, 2, 3]

Key Seasonal Factors

• Fading Summer Demand: Road trip and vacation travel drop significantly after the summer driving season ends.
• Shorter Days: The end of Daylight Saving Time and earlier winter sunsets mean fewer miles driven in the evening hours.
• Winter-Blend Gasoline: Refineries transition to producing winter-blend gasoline, which is cheaper and less costly to manufacture than strict summer-blend environmental formulas. [1, 2, 3, 4]

Other Contributing Influences

• Increased Supply & Refinery Output: Refineries completing seasonal maintenance have ramped up production, and strong demand for diesel and jet fuel has kept overall refinery utilization high, making gasoline an abundant byproduct. [1, 2]
• Lower Crude Oil Benchmarks: Global oil benchmarks like Brent crude and West Texas Intermediate (WTI) have declined alongside easing supply constraints