Even though E15, a higher-blend ethanol fuel, is safe and dependable for all cars made in the 21st century, an arcane government regulation limits how retailers can sell E15 during the summer fueling season (June 1 through September 15). As we approach the end of this arbitrary period, please ask your policymakers to support an RVP waiver! Growth Energy believes that American drivers should have access to this affordable option year-round.