[lightedman]

"Every gas station on a corner has the same price because it's a highly competitive market not because of collusion."

Huh? I can go to most any gas station-occupied intersection and you will always find two that match and one (usually a Persian-owned Chevron) which is consistently a dollar or more higher per gallon across all grades of fuel.

[BeetleB]

Same here. I've never seen 2 gas stations near each other offer the same price. And large price disparities are common.