I'd like to hear about experiences with auto fuel in carbureted RVs. I'm in California and our auto fuel typically has 3 to 6% alcohol. I've been flying an O-200 powered Midget Mustang I built for 20 years. It's not an RV but it is metal and I hope you'll share your experience with me. I stuck a valve in my O-200 after a steady diet of 100LL, ran auto for years, then quit when the gasohol showed up. An RV friend said you guys have tons of experience with auto and to post here. What have you found out?