What's Going To Cost More: Milk Or Gas

Went to the grocery store yesterday and found out that milk costs $2.83 a gallon for generic skim milk and $3.10 for brand skim milk. About a year ago, it was $2.02 a gallon.
Gas is gong for $3.57 a gallon, for 87 octane.
In 3 months, which will be more expensive?

Thank you President Obama.