Since the introduction of ethanol fuels at dockside pumps, we’ve had a slew of reader inquires about the effects of E-10 on fuel lines, fuel tanks, two-stroke engines, and four-stroke engines. We recently tested some products designed to address these issues, specifically those that claim to combat the problems associated with phase separation in E-10. Practical Sailor tested: E-Zorb from Marine Development Research Corp. (MDR), Sta-bil Marine Formula Ethanol Treatment from Gold Eagle, PRI-G from Power Research Inc., Star Tron from Star brite, and Techron from Chevron. The claims of each product varied, but the test products fell into one of these general categories: conventional fuel storage additives, ethanol fuel…