Earlier this month, it was reported that Underwriters Laboratories had not yet approved
gas dispensing pumps that were labeled with the UL87 certification to carry concentrations of ethanol
higher than 10 percent. Meanwhile, many states in the corn belt were considering bumping the current E10 standard up to E15, which is a blend of 15 percent ethanol and 85 percent gasoline. Since that initial story broke, UL has apparently revisited the issue and has decided to allow the pumps to dispense gas with up to a 15 percent concentration of the alcohol fuel.
The reason for the change of heart? According to UL, there isn't any research that indicates there would be a serious safety risk when increasing the UL87-certified pumps ethanol content from 10 percent to 15 percent. Still, UL suggests that dispensers check with the manufacturer for final approval before using any concentrations higher than E10. Next question: What happens when states decide to go with E20?
[Source: Underwriters Laboratories