Carb Heat Soak
Here's the thing though. Ethanol ain't your enemy really. As long as you actually DRIVE your cars and don't let them just sit like a dang old man ethanol is arguably a good thing. It has less resistance to detonation, because it has better octane qualities. I use 93 super with ethanol in Vixen and she likes it. Since we drive her literally all the time, I don't worry about it. I'm gettin ready to put her down to finally do the transmission and rear end swap before too much longer and I'll probably add some sta-bil to the tank then. But all in all ethanol ain't your enemy.