[Alberta's Child]

Shouldn't come as a surprise to anyone. Gasoline prices have risen in April and May nearly every year in recent memory. I've speculated that much of the increase can be attributed to short-term supply disruptions and refinery adjustments as the EPA-mandated summer fuel blends are introduced.

I seem to remember posting this same point for at least the last four or five years.

[SoldierDad]

Question? Why, if the summer blend is better for the environment, is there any need for a different blend in the other months of the year? I have a noticable increase in fuel efficiency with the summer blend over the winter blend. Having no need for a difference in blends might also drop the price.