Yeah, the stinky kind. I filled up my tank yesterday, and at the pump I noticed the gas stunk bad, almost like diesel. Can bad gas cause overheating, or is it my thermostat sticking? I thought these engines were designed to run on crappy fuel. I've had my temp gauge spike before, but never multiple times in a row and losing power like that. Normally on the highway I can easily do 70-75, but I was struggling to hold 50 at one point.