The gasoline crack spread measures the price difference between crude oil and gasoline, representing the gross refining margin for converting crude oil into gasoline. This spread indicates refinery profitability and is actively traded as a futures spread strategy. The crack spread fluctuates based on seasonal driving patterns, refinery capacity utilization, and supply-demand imbalances.

Gasoline crack spreads typically widen during summer driving season when gasoline demand peaks and narrow during winter months when heating oil demand takes priority. Refiners use crack spread trading to hedge their margins, while speculators trade spreads to profit from seasonal patterns and refining industry dynamics. Environmental regulations also impact crack spread relationships.

Real-world example: The gasoline crack spread widens from $15 to $25 per barrel ahead of Memorial Day weekend as refiners increase gasoline production for summer driving season, creating profitable opportunities for spread traders.