When you find cheap gas and have to wait forever to get it. You begin to get gas rage.
Gas rage also occurs when you fill up at the pump, realizing that the extra ten dollars in your pocket is suddenly gone.
"John as so pissed off waiting in line at Costco for gas that he chased down the guy that cut him off with a crowbar."
"Did you see that guys gas rage when he realized that he spent over 100 dollars to fill his tank up?"