Speedway gas has been the absolute worst performing gasoline in my motorcycle. I can’t stand it. When I made my trip to Bristol, Indiana, I got a tank of Speedway gas on my way back, and that was a serious regret on such a hot day.
The weather was intensely hot and humid; I was sweating like a beast. On top of that, the Speedway gas made my bike run poorly. I was no longer able to accelerate as I normally would, and I could feel the engine lagging.
These performance issues don’t happen with other brands of gas, such as Citgo (my favorite), Shell, or BP. I don’t really count the off-brand and small brand gas stations when I’m speaking of performance, since I don’t have enough data on Fuelly to back anything up. There’s not enough of them for me to really get a good gauge on how it works.
The bottom line is that with Speedway MPG, filling up a motorcycle on it isn’t worth the extra 20¢ that you’ll save each tank.
I’m just glad it doesn’t cause engine knocking. Does Speedway put extra ethanol in their gas? I’m going to try and find out.